Bocchan, Oikomi Ai desu yo.

Hiyori works part-time with Rennosuke, a high school delinquent full of contradictions. He alternates between intensely drawing cute images and quietly petting an imaginary cat when alone. Hiyori has long wanted to befriend him but has never managed a real conversation, especially as graduation nears. One day, by chance, he finally gets to talk to Rennosuke and feels hopeful—until a sudden, confusing situation arises.