From Blissful Sin:

In High School they had an indecent relationship. Now eight years later, at the school where Takebayashi is a teacher, that same Ono has come to be the school nurse. Smelling like an old man, sweet pick-up lines, totally aloof and bantering Ono. Takebayashi sighs. He gets angry, fights, and is surprised later… to find himself in Ono’s arms?

From Anonymous:
6) As it is: Tsuji is crying again because a broken heart when suddenly Aizawa, his best friend, kisses him.
(Doujin Sono Mama de)