Tenshi-tachi no Hohoemi

September 31, 2000, you accompanied your friends to job interviews. You and your friends are senior college students, but unfortunately you need to continue college for two additional years due to some reasons. Since you cannot graduate from college now, you are in a bad need of a part-time job to continue your education.
At the same time you accompanied your friend to job interviews, you received some messages. Since that day, you become a private tutor for four girls.

[From Anime Densetsu]