From ShoujoMagic:

Story 1: Automatic Angel
Serika, a high-school student, is known for being a well rounded girl with an attractive face and figure. She is clear-headed and has a talent for sports. But she's an... android!?

Vol. 2, Story 2: The Winter Was Trying to End
Tale of a high school professor and student.

1) Twins:
Moe-rin (Moeka) attends an all girls school. Shino-chan (Shinobu) attends an all boys school. They're brother and sister twins who are very close, but Tori-chan (Professor Torikai) from the all boys school falls for Moe-rin at first sight, and Shino-chan is hot for Professor Mifuyu of the all girls school. They're still only just kids, but which twin will be first to have a sexual experience...?

2) Please Don't Stop Us [Watashi-tachi wo Tomenaide] :
A girl tries to create one final, ultimate memory for her boyfriend, who has to leave the country because of his father's work.

3) Central Kyoto Love Story [Shijou Riverside Town Love Story] :
The story of a girl who transfers to a Kyoto school and her experience with a temple master's son.

Kyouichi's indecisive character has led him to repeatedly commit the foolish mistake of adultery. One day, Imagase, a college classmate he hasn't seen since graduation, shows up as the private detective hired by his wife to investigate his infidelity. Imagase, however, proposes a deal. He won't tell Kyouichi's wife about his affairs, but, for compensation, he makes an unbelievable demand: "I want your body in exchange..."

In the second edition, there is an extra chapter.