Baby Face ～ベビーフェイス～

The hero here is a loser guy (who resembles the infamous Isaku) who flunked the college entry exam for the 3rd year running. He is not the "In" kind of person and does not know what's fashionable or not. His every attempt to search for a female companion ended up with the female party calling him "Disgusting!","Pervert!" etc... Being such a loser, he decided to commit suicide one summer, but he is not satisfied with going without enjoying the ultimate life experience in life, that is "Encounter With The Female Kind!" And he is going to do it the crooked way, by being a tutor to young females, gaining the trust of his students, and finally....

[From Anime Densetsu]