Honey Senior, Darling Junior Vol. 2 (manga)

After a ceremony for their tennis club, a senior and a junior decide to take a spur-of-the-moment trip. When they reach their destination, however, they find that there are no vacancies - except in love hotels. With no other options, they act as if they are lovers and check into a room. What begins as shy, unexpressed mutual attraction quickly evolves into a full-blown affair. After their innocent vacation turns into something not quite so innocent, how will they handle returning to the world of friends, family, and school?