I'm in love, but I'm a master, Mr. Sawaki's heart class.

Sawaki-sensei is a former high school moral society teacher who lives in the castle town of Odawara.
Now that he has retired, he takes a walk here and there every day. He's a little snobby, so he sometimes says harsh things to people he meets, but Sawaki-sensei is still wandering around today, looking for happy encounters and heart-to-heart contact.