Metal Heart (Manhwa)

Metal Heart (메탈하트) is a manhwa by YOON Jae Ho

Minwoo Hyun is a normal 11th grade student with a dating skill of a jam jar, who is a game maniac crowned as the best gamer in the country, with unparalleled skill in fighting games. A few days after an accident during a fighting game called Metal Heart 2 that Minwoo has played by coincidence, the heroine of the game, Sia Min, appears right before Minwoo's eyes! (In reality, a mega-corporation called MegaTech, maker of Metal Heart 2, has employed a battle android into the real world to collect data.)

However, because of the 'incident', Sia has a personality of a girl from a dating sim game, and she thinks Min Woo is the main character of that dating sim game. It's hinted that something bad is going to happen if Sia gets jilted by Minwoo. So Minwoo reluctantly accepts this 'unique' situation and with the help of MegaTech's special agent Nuri Han, playing the part of Minwoo's 'childhood friend', they begin their adventure to make Sia's dream come true!

Metal Heart has examples of:

 * Accidental Pervert: Minwoo
 * Ambiguously Brown: Nova
 * Animal Motifs: Nova is a loli that acts catlike.
 * Armor-Piercing Slap: Minwoo is at the receiving end from Mina and Nuri.
 * Awesomeness By Analysis: Minwoo from fighting games he can advise others on how to win.
 * Barbie Doll Anatomy: Sia is missing certain features but this is justified since she's an android.
 * Bishonen: Or something similar for Koreans.
 * Blade Below the Shoulder: G-Man has these.
 * Bland-Name Product:
 * The Y-BOX.
 * Brainwashed and Crazy: Kinda, Fairy made the other students lose themselves on their desires.
 * Cannot Spit It Out
 * Carry a Big Stick: Fairy Dual-Wielding two maces called Morning Star that she keeps in her hair as weapons.
 * Clothing Damage
 * Contrived Coincidence: Minwoo's life is similar to the background of the game Metal Heart +.
 * Cooldown Hug: Sia gave Nova one after the later lost to her and entered a Superpower Meltdown.
 * Cool Shades: G-Man wears these.
 * Cosplay
 * Crash Into Hello
 * Cross Dresser: Yura Hong does this an attempt to sneak in the boys locker room to take pics.
 * Cross-Popping Veins
 * Curb Stomp Battle: Any one of the EA series vs. tanks, MegaTech's personnel, the US Navy, and/or a hoard of students. No casualties but a lot of broken bodies and equipment.
 * Cute Witch: Fairy is a Twin Tails Princess Curls witch who owns a Flying Broomstick named Tock that acts like her Magic Wand.
 * Date Peepers: Mina and Yura did this to the group date of Minwoo, Sia, Inhyuk, and Nuri for their own reasons.
 * Dating Sim: The Genre of the Metal Heart + game that is what Metal Heart 2 was based on and the type of game Minwoo is bad at and now has to play a real life version of it with Sia.
 * Death Glare
 * Disappeared Dad
 * Dude in Distress: Minwoo became one when Nova kidnapped him in order to use him as bait for Sia.
 * Dojikko: Arum, the homeroom teacher.
 * Dual Tonfas: Sia's weapon.
 * Elegant Gothic Lolita: What Nuri used to wear when acting like a Daddy's Girl.
 * Embarrassing Nickname: Goonyung Song's is Dong Gu Mong which means 'anus' and hates being called by it.
 * Hair Decorations
 * Everything's Cuter With Kittens
 * Executive Meddling: An in-universe example to help Minwoo with Sia but there are others in MegaTech who are not as patient and sends the other EA units to fight with Sia in order to retrieve her.
 * Explosive Instrumentation
 * Eye Pop
 * Face Fault
 * Fainting: This happens to Nuri and Yura at one point.
 * Fan Service
 * Female Gaze
 * Fighting Game: The genre of the games Metal Heart and Metal Heart 2, the type of games Minwoo is best at.
 * Funny Afro
 * Genre Savvy
 * Girlish Pigtails: Nova and Fairy have this hairstyle.
 * Girl Next Door: Nuri, after she bought out the neighboring house next to Minwoo's home.
 * Giving Someone the Pointer Finger: Nuri gave this to Minwoo and Sia.
 * Goggles Do Something Unusual: Minwoo was given special glasses by Megatech to help him by transmitting information to him.
 * Dropped Glasses: The first pair was broken like this.
 * Good Angel, Bad Angel: Minwoo had this when he was thinking over whether or not he might be inconveniencing the girl he made cosplay as Metal Heart 2's heroine, Sia.
 * Groin Attack: Brute Lee was victim of this when he tried to fight Sia to make her join the Kung Fu Club. His legs were shorter than hers.
 * Hot Teacher/Sensei-chan: The main characters' homeroom teacher, Nuri's cousin, Arum.
 * Idiot Hair: Sia has this.
 * Ignored Enemy: Sia ignored Park Chanoh's pitch, Anaconda King, because she does not see the point in hitting it.
 * I Just Want to Be Normal: What Sia wants.
 * Imagine Spotting
 * Immune to Bullets: The Ea series.
 * Important Haircut: Nuri used to have long hair until
 * Innocent Cohabitation: Nuri and Sia, after Nuri's newly bought house burned down, lives with Minwoo and Mina.
 * Instant Sedation
 * It's Not You, It's My Enemies: Sia tried this to get away from Minwoo to protect him but he convinced her stay.
 * Jaw Drop
 * Jerk Jock: Goonyung Song
 * Kendo: Mina is part of her school's kendo team.
 * Kid With the Remote Control: Nuri is this for Minwoo's protective vest. Minwoo is implied as this for Sia during "battle mode".
 * Lethal Chef: Nuri, her attempt at a lunch for Minwoo is censored with the only recognizable ingredients are a twig and tentacles.
 * Little Miss Badass: Nova
 * Luminescent Blush
 * Magic From Technology: Fairy has a broomstick that has the ability to enhance anyones desires in order to make them lose their judgment.
 * Male Gaze
 * Mega Corp: MegaTech, the creator of the Metal Heart series, who have other divisions besides the game industry like a weapons R&D.
 * Meganekko: Yura.
 * Measuring Day: MegaTech high-jacked it in order to hide the fact that Sia was a robot girl. Then things get from bad to worst.
 * Missing Mom:
 * Mission Control: Nuri acts like this sometimes for Minwoo.
 * Mistaken for Gay: Goonyung Song thought this for himself after a misunderstanding after he lost to Minwoo in judo.
 * New Transfer Student: Sia and Nuri both transfer to Minwoo's high school.
 * Nosebleed
 * Not What It Looks Like: Many instances
 * Mina walked in when Nuri was trying to remove Minwoo's underpants.
 * When Nuri went to check on Minwoo in the chamber she saw Yura fainted on top of him.
 * One year before the start of the story, Inhyuk walked in the infirmary and saw Yura on top of an unconscious Minwoo taking off his clothes.
 * Ordinary High School Student: Minwoo
 * Otaku: Minwoo and Inhyuk. Inhyuk is bit more lucky when it comes to the opposite sex except with Nuri.
 * Overprotective Dad: Nuri's father, a director of MegaTech.
 * Panty Shot
 * Paper-Thin Disguise: G-Man uses this, Minwoo and Nuri see right through it even if anyone else does not.
 * Parental Abandonment
 * Parental Substitute: Mina, who takes of the place of their mother despite being his younger sister.
 * Playing to The Fetishes
 * Powered Armor: In the minimal sense, MegaTech gave Minwoo body armor to protect him from impacts and has a shock feature that Nuri has the remote control to, in order to revive, help, or punish him.
 * Power Gives You Wings: The EA units gain these during their Super Mode/Superpower Meltdown.
 * Puppy Dog Eyes: Minwoo does this to Nuri.
 * Ridiculously Human Robot: Sia and the other EA units. They think they are the characters from the game and don't even know that they themselves are robots.
 * Right Behind Me: Minwoo tells Inhyuk how he plans to make Mina cosplay as Sia, but Mina heard him.
 * Robot Girl: Sia and the other EA units.
 * Satchel Switcheroo: How the games Metal Heart + and Metal Heart 2 were mixed-up.
 * Second Year Protagonist: Minwoo
 * Shipper on Deck: Nuri as she's working on getting Minwoo and Sia together.
 * Shower of Awkward: The day after Nuri's house burned down, Minwoo saw her in this situation when he entered the bath after he woke-up.
 * Sibling Terminology: Mina calls her brother Minwoo "oppa", Korean for brother.
 * Simple Staff/Fighting with Chucks: Nova's weapon is a three section staff.
 * Something Else Also Rises: This happened because Yura was too close to Minwoo while trying to find a way out.
 * Stun Gun: Nuri's Weapon of Choice
 * Super Window Jump: Nova was in a jug that smashed through the shop's window before she broke out of it.
 * Spell My Name with an "S": Due to the rather inconsistent roman spellings for Sia's name, it comes out as Sia, Shiah or Siah.
 * Sweat Drop
 * Taking the Bullet:
 * The Bully/Heel Face Turn: Before Inhyuk became friends with Minwoo, he used to be his main bully until Minwoo saved Inhyuk from a big guy by beating him with a broken fighting game machine.
 * The Cameo: In the first chapter there are a lot of characters being cosplayed from Manga and Manhwa during the cosplay festival.
 * There Can Only Be One: The backstory of the Metal Heart game.
 * Tron Lines: The EA series have them on their body when they go Super Mode.
 * Tsundere: Nuri
 * Verbal Tic: Nova ends her sentences with "nya."
 * You Are Number Seven: Sia is number in 7 the EA series. Nova is number 5.
 * You Gotta Have Blue Hair: Mina, Minwoo's sister, has pink hair. Nova, an EA unit based on the game character, has green hair.
 * Zettai Ryouiki: Sia