Sekai Ichi Hatsukoi: The World's Greatest First Love - S01

Takafumi Yokozawa's heart has been broken. In his despair, he decides to drown his sorrows the only way he knows how: with a metric ton of booze. After getting blackout drunk, Takafumi wakes up naked in a hotel room. Greeted by Zen Kirishima, a coworker and the editor-in-chief of the shounen manga magazine Japun, Takafumi finds himself being blackmailed. It turns out Zen had taken some rather incriminating pictures the night before. Takafumi has to go along with the editor's every whim; he gets tricked into drinking together, eating fancy meals he cannot afford, and even visiting the Kirishima household. Slowly, with help from Zen and his daughter, Hiyori, Takafumi finds himself forgetting all about his broken heart.