Man/man school love adult

Beautiful but unemotional Ishimoro sensei has always been chased by women and has become an "expert at romance", despite never being involved in it. Students and teachers both always ask for his advice. The only one who doesn't is gym teacher Yamada who seems to hate him with a passion for some unknown reason.

V.1-2:

1-4. Komori Tadamachi loves teaching at an elementary school, the only problem is fellow teacher Takigawa Kyou. Always being compared to the perfectly composed and devastatingly handsome Takigawa (even by the students!) is really destroying Komori self-esteem. Still, Komori finds himself being drawn in by Takigawa's effortless charm...

5. Sensei no Kokuhaku (Sensei's Confession)
Kunihara Sensei is a handsome college prep teacher who is used to fending off the advances of his female stud

From Rain over Paradise:
Noe is a devoted geography and history teacher with a fancy for bodies, or more precisely, male bodies. And one of his colleague's bodies has especially piqued his interest.

Aratsuka Kaoru, a math sensei teaching in an all boysââ?¬â?¢ middle and high school boarding school, is also known as ââ?¬Å?Alaskaââ?¬Â because of his coldness. He has never been in love before because heââ?¬â?¢s afraid to share his feelings with another. After some issues, he spent a night in the room of the infirmary sensei, Suzuki Kouta. It was the first time someone touched him. What will happen thereafter?

From K No Kouzu’s Intro Page & Backlash67:
The beginning of a love story set in a school for eccentric artists. Kei Onodera, a college student majoring in science starts working part-time as a lecturer at an art prep school. Immediately, he catches the

Aiming to become a sensei like his former sensei, Sugiura Sakae came to an elementary school as a contract teacher. Coincidentally, his former sensei, Fukada Ryuuji, is currently teaching here. Ryuu sensei is Sakae’s idol as well as his pillar of support. However, the "Ryuu-sensei" he once so admired, is totally different now. Feeling bothered, Sakae slowly realizes that his feelings for sensei have become love. But what about Ryuu-sensei?

English teacher Kijima-sensei and his six years younger colleague , PE teacher Ono-sensei are working in an all-girls school on a hill. After Kijima overhears a girl confessing to the PE teacher, Ono asks him for advice. The two get closer bit by bit and in a conversation Ono confesses that he has a one-sided love. Who is the person Ono has one-sided feelings for and how will Kijima handle the matter...