Kana and Neji deny they have feelings for one another until someone else points it out. Everyone else knows but them.
Sasuke's sister falls for Naruto while she unintentionally charms her two other friends.
Jeremie falls for someone other than Aelita
Inuyasha falls in love with an injured girl
Love triangle
It's normal day of class until Iruka sensei decides to plan a huge project for the end of the school year. He calls it the "30 day project". Everyone has to live with another classmate of the opposite sex for a time period of one month.