This Heartbeat (1988)

Kogure Nao is a shy and cute high school student. One day, Onise Taiga asks her "would you like to date with me on the promise that we will get married?" Nao is unable to turn down his proposal because she is scared of him. Taiga has red hair and piercing eyes. His appearance gives off the impression that he is a bad boy, but he is actually considerate to others and good at cooking. After getting to know Taiga, Nao begins to have feelings for him.

A spark of attraction smolders, then ignites, between two teens from different high schools who meet by chance at a party.

Aoi Nishimori's parents moved to another city for work, but Aoi didn't want to transfer to a new high school. She stays behind and lives in an apartment by herself. Shūsei Kugayama moves in next to Aoi's apartment. Shūsei is a very popular student at their high school. Due to a mistake, Aoi makes the sprinkler go off in his room. Until Shūsei's room is fixed, he stays with Aoi.

A pair of former high school sweethearts reunite after many years when they return to visit their small hometown.

Ryan and Jennifer are opposites who definitely do not attract. At least that's what they always believed. When they met as twelve-year-olds, they disliked one another. When they met again as teenagers, they loathed each other. But when they meet in college, the uptight Ryan and the free-spirited Jennifer find that their differences bind them together and a rare friendship develops.

Ninako Kinoshita has never been in love until an encounter with the school's most popular boy, Ren Ichinose, leads the two to befriending each other. Ren's patient and kind personality is a far cry from his unapproachable idol status at school, and soon Ninako falls in love with him. However, she must cope with the fact that he already has a long-time girlfriend.

A valedictorian's declaration of love for a high-school cheerleader launches a night of revelry, reflection and romance for a group of graduating seniors.

Four high school students look to redefine themselves after graduation.

Seventeen-year-old Anne just fell in love with Sasha, the most popular girl at her L.A. public high school. But when Anne tells her best friend, Clifton—who has always harbored a secret crush on her—he does his best to get in the way.

A dethroned queen bee at a posh private high school strikes a secret deal with an unassuming new student to enact revenge on one another’s enemies.