Golden Days

Golden Days is a shoujo manga with shounen ai undertones created by Takao Shigeru. It was serialized in Hana to Yume, and collected into eight volumes.

The story is about Soma Mitsuya, who cares only about his violin and his hospitalized grandfather. One night his grandfather’s condition suddenly worsens, an earthquake hits, and Mitsuya finds himself lost and alone in Japan of 1921. Jin, a childhood friend of his grandfather, mistakes Mitsuya for his grandfather and takes Mitsuya home.

Contains these tropes:

 * Big Fancy House
 * Bishonen
 * But Not Too Foreign
 * Cool Big Sis: Yuriko
 * Chekhov's Gun:
 * Despair Event Horizon: almost all of the main characters at some point.
 * Domestic Abuser: Kei's father.
 * Don't You Dare Pity Me: Ubukata Matsuri to Aiko.
 * Hooker With a Heart of Gold: Tsuyuko.
 * Ho Yay
 * Identical Grandson: Mitsuya and his grandfather are identical.
 * In Series Nickname: Knight(Mitsuya/Yoshimitsu), Bishop(Aiko), King(Jin) and Queen(Yuriko)
 * My Beloved Smother: Mitsuya's mom is really protective.
 * Replacement Sibling: Aiko
 * Set Right What Once Went Wrong: Mitsuya thinks this is why he went back in time.
 * Tear Jerker: stock up on tissues before you read the final volume(#8).
 * The Atoner: Kei
 * The Roaring Twenties
 * Time Travel
 * Time Travel Romance: between Kei and Setsu.
 * Traumatic Haircut: Aiko's mother cuts off her hair to make her look like her dead son.
 * Unrequited Love: Jin, first for Mitsuya's grandpa and later for Mitsuya himself.
 * World War II
 * Worth Living For:
 * Traumatic Haircut: Aiko's mother cuts off her hair to make her look like her dead son.
 * Unrequited Love: Jin, first for Mitsuya's grandpa and later for Mitsuya himself.
 * World War II
 * Worth Living For: