From DMP:
Hikaru, a second year high school student, is obsessed with Shima, a male teacher. Surprisingly, Shima is not averse to the boy's affections. He even convinces Hikaru to study hard and they will be "pretend lovers" for Hikaru's last year in high school. However, Amamiya, another teacher at the school and an ex-lover of Shima, steps into the picture and tries to win him back.
Will Hikaru and Shima's passion prove great enough to hurdle all the obstacles stacked against them?

Far away from the city, deep within the mountains, sits the all-boys high school Shidou Academy. In years past, this school housed only the sons of the most elite families in the country, but these days it welcomes all into its historic halls.
Volume 1:
Takumi, a boy from humble origins, prepares to begin his second year at the school. Held back by psychological issues, Takumi's indifferent attitude has garnered him no friends and a reputation as a cold fish. Then along comes Gui, a wealthy and charismatic student born in America. Gui is the only person who doesn't see Takumi as odd, and the two become friends. But how will the two cope when Gui confesses his love to Takumi? And can the couple survive the revelation of the secret behind the psychological problems that plague Takumi? (Source: Blu)
Series: タクミくんシリーズ
Based on novels by Shinobu Gotoh.
1. June Pride [６月の自尊心] (2/2001)
2. Hadashi no Waltz (Barefoot Waltz) [裸足のワルツ] (2/2002)
3. Kisetsu Hazure no Kaidan (Tales out of Season) [季節はずれのカイダン] (12/2003)
4. Bibou no Detail [美貌のディテイル] (12/2004)
5. Jealousy (12/2005)
6. Hanachiru Yoru ni Kimi wo Omoeba [花散る夜にきみを想えば] (12/2006)
7, 8. Pure (2 vols.) (12/2007, 12/2008)

From DMP:
Satoru Tendou, a cameraman for the school newspaper, has confessed his love to track star and childhood friend Shirou Sawaguchi every spring since entering high school. Each year Shirou has rejected him claiming that his confession is a sick joke. As the spring of their third year approaches, Satoru is starting to wonder if he should give up on his unrequited love or risk being rejected a third time. Will Satoru be able to convince Shirou that his love is genuine? Or will Seiichi Hiro, the editor-in-chief of the school newspaper, steal Satoru away before he and Shirou can reconcile their differences?

Tsukishita is completely dependent on his little brother. It's the first day of school, and his little brother has already had to find Tsukishita with the things he's forgotten. When a group of girls try to help him find his older brother, they mistakenly think he's Kagami's. When Kagami realizes who he is, he also remembers the day he confessed to Tsukishita. Tsukishita offhandedly said some heartless things to Kagami; did he really mean them the way they sounded?