Honey Senior Darling Junior vol. 1 (Yaoi manga)

A senior and a junior, members of their school’s tennis team, take a spur-of-the-moment trip. When they arrive, however, they find no hotel vacanies, except in love hotels. With no other options, they act as if they are lovers and check into a room. While playing around, one boy accidentally touches the other’s private parts – but they find that they can’t stop there. What begins as shy, unexpressed mutual attraction quickly evolves into a full-blown affair.