If you're looking for manga similar to My Sempai, you might like these titles.
Ever since he was a kid, Morisaki Aki has been loved by the spirit of misfortune. And it's continued, even after he started high school! He is then coerced by his upperclassmen, Akabane and Tokunaga, into joining the gardening club. But as it turns out, that was just a cover for... the Loan Shark Club! He gets involved with upperclassmen that not even the teachers would want to cross. And thus begins his unfortunate high school life. However, unbeknownst to him, mysterious feelings begin to bloom. These three guys with their clashing personalities grow together to paint a bold graffiti tag of teenage angst!
Life doesn’t always go as planned. High school sophomore and star catcher Itoshima devoted every fiber of his being to baseball, only to have the cruel mistress that is fate rip his one love in life away from him, due to an irrecoverable injury. Freshman Saitozaki never dreamt that his beginning days of high school, what should be the prime of his youth, would consist of battling incompetent bus schedules, unsympathetic teachers, and punishments that put his very life at risk. He also never imagined having these strange new feelings that have arisen ever since Itoshima crossed his path in his time of need. Is fate playing another harsh trick on this hapless duo, or will Saitozaki and Itoshima take destiny into their own hands and rediscover how to laugh and love?
Haruto manages to get into the school of his dreams, Seijo Gakuen, and becomes a resident of the student dormitory there. He gets dumped by his long-distance girlfriend, but the beautiful piano he hears from time to time heals him. Is a cute girl from the faculty of music playing it? Suppressing his impatience, Haruto opens the door to the music room, and discovers the beautiful profile of a boy playing the piano. The boy is Sota Misuzu, and Haruto had saved him just days before from a molester on the train. As an apology from Misuzu, who had been unable to speak up despite being molested and ended up fleeing the scene in embarassment, Haruto requests something...
Fujioka accidentally stumbles across an upperclassman, Naoya, on the school roof. Then Fujioka's feelings of friendship develop into something more?
Kogure Yuuta confesses to Ebina-senpai. This is the story of their relationship.
Wakamatsu Haruka (3rd year of middle school) finds the new student Hachiya Shuuto (1st year of middle school) sleeping on the train station and Haruka can't help wanting to take care of the small Shuuto.
Fujinami Kou is a high-school second-year who had lost his boyfriend, an upperclassman schoolmate, to a car accident an year previously. On the anniversary of Misumi senpai's death, Kou is dispirited and contemplating skipping school. Kakitsubata Saki, a first-year, sees him and offers help, assuming that he's ill. As Kou startles at the sight of Saki's face and mentions that he resembles "the person I used to go out with", the younger boy is instantly intrigued and resolves to discover his sorrowful, introverted upperclassman's secret.