Stitch it with love and seal it with kisses

One day, Sena, a college student, is suddenly approached by a frivolous handsome man named Ruka. Sena's true feelings of unrequited love for his best friend seem to be seen through by Ruka's words, and Sena instinctively runs away from the scene. Even though Sena doesn't want to get involved, Ruka keeps getting involved in various ways, and when Sena gets drunk and tries to forget his unrequited love, he approaches him and says, "I'll take care of you"...!?

(Source: Kaiohsha, translated)

Note: Includes one extra chapter.