I really like the last story. Too bad it was only 1 chapter, and too short lived. I think they could definitely have expanded that to make its own manga.
STUDENT-X-TEACHER ROMANCE Ookawa Chitose due to her parents work she's had to enter a new school Shirakiran Academy for girls... Entering to greet her teachers some girls tell her of a legend of the church fir tree there she meets Tani-sensei an old friend who she hadn't seen in 4yrs. is a teacher a there now. And all the girls liked him their motto is Tani-sensei belongs to everyone though he takes great joy in teasing Chitose (Chi-chan)... Chitose Inadvertently confessed to Tani-sensei now what will happen
The script used for narration/thoughts for the first story was too fancy and hard to read, so that was a bit annoying. To be honest, I didn't care for the first couple at all, either; I would much rather have read multiple chapters on the 2nd and 3rd couples.