어느날, 고등학생·사토 이치로가 남자 화장실 좌변기 칸에 들어가자, 그곳에는 왠지 「도깨비의 코지마」코지마 카나 선생님(♀)이!? 고리가 망가져 버려서, 좌변기 칸에 갇힌 두 사람의 ....싸움이? 시작되었다!

소나기를 맞은 사토가 세탁방에 뛰어들자 거기에는 비에 젖은 코지마 선생님이!? 뜻밖에도 벼락을 싫어하는 코지마 선생님..벼락으로 떨어진 차단기를 복구시키려고 하는데...

왠지? 사토네 방에 찾아온 코지마 선생님.....코지마가 가져온 앨범을 함께 보며 그곳에는 고등학교 시절 코지마와 함께 찍히는 초등학생 사토의 모습이...둘의 뜻밖의 관계란!?

지인의 결혼식에 나가기 위해 남쪽 섬에 온 사토 일가...그러나 왠지 그곳에도 코지마 선생님이!? 정시까지 두 사람은 바다에서 놀면서 기다리게 되었는데...

Mayu wishes to grow closer with Rin and lunchtime provides the perfect chance! Later, Rin must shield Mayu from prying eyes after her shirt gets caught in the train door.

Takashi returns home and finds Hikari in his bed. Later, Hikari decides she’s taking Takashi shopping whether he wants to or not.

Takahashi’s coming down with hypothermia and Hikari must warm him up. Later, Hikari’s mischievous nature catches up to Rin and Mayu. Handcuffs are involved.

Hikari grows jealous of Takahashi and Saya’s relationship, resulting in an embarrassing moment for everyone involved. Has this finally cost Hikari her bond with Takahashi?

Koh vows to find a girlfriend before graduation, but it’s not like he’s got the chance to meet girls. Wait… Why the Hell is the School Nurse Here at his job!?

Koh humors Chizuru by agreeing to split her lottery prize, but he doesn't know she's about to hit the jackpot. Now they're going on an all-expenses paid vacation together!

Koh didn’t get any chocolates on Valentine’s Day. Will his luck change after he runs into Chizuru? Either way, graduation is approaching and he has yet to find a girlfriend...