From Hoshikuzuu Scans

To high school teacher Kasai, Kato Reiji is a troublesome, yet cute student. Despite being confessed to by Kato, Kasai does not overstep student-teacher boundaries. Spring goes by and he sees Kato off at graduation. A few years have passed and Kato is now a teacher himself. And he happens to come to the school that Kasai works at...

From Hoshikuzuu Scans:

As the only son of a trading firm, Asakura Michitada enters the dormitory at an all-boys school. There, he is put in the same room as his childhood friend and only person he could trust, Tachibana. But for Asakura, their reunion is something of a more complicated nature.

Note: The magazine and tankobon have different versions of the epilogue.

From Hoshikuzuu Scans:

Kengo is depressed after injuring his arm during baseball practice. He meets an unsociable student in the music room. The next day, after realizing that the student was his classmate, Yoshioka, who has never shown up for class, he visits the music room again. Despite Yoshioka's evasiveness, Kengo's persistence leads to the discovery that Yoshioka was held back one year due to a case of bullying. This is a story that depicts a tale of love between two wounded boys.

Ch. 1 - Valentines Day rolls around again and Daisuke knows he won't receive any chocolate yet again. However, he opens his locker to find chocolate with only a mail address attached. Who gave him the chocolate and why? (Shounen-ai)

Ch. 2 - Kouki who has quite an innocent face, is actually the carnivore type. He fell in love with a herbivore type, who is the owner of the bar (aka Master) he is currently working part-time at. Every day, he tries to attack the Master with every chance he gets and the Master somehow manages to get away every time. However, suddenly receiving a ticket to go to the hot spring, will his chastity be safe this time as well…?! (Yaoi)

Ch. 3 - A story of unreciprocated love and friendship. Honjou with his one-sided love for Miki who in turn bullies him. Satonaka supporting a friend and questioning what love is. (Shounen-ai)

Ch. 4 - An editor and university literature student meet at a cafe over spilled coffee. Finding they share an interest in author Kurusu Takao, they begin meeting regularly to exchange books. The shy, pessimistic editor begins to fall for his cool and calm companion. How does their relationship develop? (Shounen-ai)