Renai Zemi

Contains several stories:

1. Renai Zemi (恋愛ゼミ)
   Shigeta Maki has a crush on his professor, but he doesn’t know the first thing about love or attraction, let alone with another man. After spying his classmate Yoshioka in a lover’s quarrel with a man, Maki ends up asking him for love lessons! What exactly will Yoshioka teach Maki?
2. Koi Shitara Mermaid (恋したらマーメイド)
   After falling into the ocean, Hirose Misaki awakens on a boat with a strange man that is convinced Misaki is a mermaid that became a human so they could be together.
3. Mori no Kuma-san (森のクマさん)
   One day, Jyou got lost in the forest and befriended Kuma, a reclusive man that lives alone deep in the woods. Jyou returns a half year later, claiming he left something behind. Heavy snow strands Jyou and he readily imposes himself on Kuma in more ways than one.

(Source: shinkeikaku)