From MegKF:

1-2) Tatoeba Sore Wo Koi To Yobunar
Nobuki is in love with Toomu but doesn't tell him. After an incident Nobuki finally confesses his feelings to Toomu, but Toomu doesn't know what his feelings for Nobuki is.

3-4) Triangle Blue
Haruki is looking for work when his friend Rei reccomends he works at a host club with him.

5) Haru was injured forcing him to stop playing tennis the sport he loves while Eiji his kouhai tries to rekindle the passion the inspired him to play tennis.

6) Negishi is convinced that he can keep his sensei out of trouble but does he realy know what he is doing.