From Chibi Manga:

Ritsu loved her uncle's cafe for a very long time. Due to debts, the business closed down. Ritsu felt down for a while, but then she decided to rebuild the cafe.

At that time, Shiina, the school's #1 troublemaker, with his pretty face, long fingers... appears in front of her: her ideal waiter. She goes after Shiina with all her might but...?!