From Chibi Manga:
Risa has unrequited feelings for the brilliant and serious Hyozan-kun. As suggested by a teacher-in-charge, Risa is asked to go to Hyozan-kun's house to teach him! Attracted to each other, the two of them fall in love. Even though they were classmates, they are "teacher" and "student". So they cannot really go out until they graduate! They want to touch, they want to kiss... but they cannot do anything! And so the two of them go about day to day being more than friends but not quite in love! Don't blush when you read this! It's a really embarassing, hot teacher-student love story!