Lock On!

Lock On! is a shonen manga by Kenta Tsuchida. It's 18 chapters long plus the original one-shot.

The story follows Kurihara Niko, who Does Not Like Men, as she becomes friends with Sanada Utsuru, a Chivalrous Pervert who is a professional photographer at the age of 17. After transferring into Niko's class, Sanada decides to start a photography club with Niko's friend, Yuki. Sanada also has a special power called "Shutter Eye," which he can use to remember everything he sees perfectly.

Lock On! provides examples of:

 * All Men Are Perverts: Zig-zagged: Most of the guys who show up for a chapter or two end up sexually harassing someone, while Sanada is a Chivalrous Pervert, Yamato is only interested in Yuki, and everyone else is fine.
 * Berserk Button: Yamato is very protective of Yuki. Sanada doesn't like to see someone make a girl cry. When he ends up doing it himself, he jumps out a window...
 * Blessed with Suck: The day after Sanada uses his eye too much, he goes crazy.
 * Chivalrous Pervert: Sanada
 * The Ditz: Yuki
 * Does Not Like Men: Niko (This is changing)
 * Evil Eye/ Mismatched Eyes: Sanada's Shutter Eye is darker than his other one. He uses it to remember anything he sees perfectly and instantly.
 * Eyepatch of Power: Sanada uses one to cover his Shutter Eye.
 * Face of a Thug: Yamato and his father
 * Genki Girl: Matsuri whenever she takes off her glasses.
 * Hand Wave: In-universe: Sanada's explanation for all of his abilities is: "I'm a photographer."
 * Jerk with a Heart of Gold: Yamato and Ueno
 * Les Yay: There seems to be a lot between Niko and Yuki. It's because Niko Does Not Like Men and has a Limited Social Circle.
 * Living Lie Detector: Deconstructed with Sanada. His master tells him that his eye prevents him from understanding love.
 * Love Epiphany:  "...because even I was able to fall in love with you."
 * Love Triangle: Niko/Sanada/Matsuri
 * Meganekko: Matsuri
 * Older Than They Look: Machiko
 * Psychic Nosebleed: Sanada gets it when he uses his Shutter Eye. And whenever he takes pictures of girls.
 * Shipper on Deck: Invoked: When Sanada decides he needs to take more pictures of guys, he tries to get Yamato and Yuki together so he'll enjoy getting a picture of Yamato.
 * Shrinking Violet: Matsuri
 * Teacher-Student Romance: One of Ueno's students has a crush on him. But then he tells her he's not interested.
 * Tsundere: Niko and Yamato
 * Vitriolic Best Buds: Sanada and Yamato
 * What Is This Thing You Call Love?: Sanada