Kohei Kato

Mika (Kie Kitano), who has a crush on Watari (Kenta Kiritani), a part-time middle school teacher, shows up at his house one day. While Watari is flustered, Mika starts cooking. Just then, Watari's fiancée, Yoko (Yasue Sato), arrives. Yoko is surprised to see Mika. The three of them end up eating together. After Mika leaves, Yoko harshly criticizes Watari and leaves in anger. The next morning, when Watari wakes up, he finds Mika there, even though she should have left the day before.

Tokine Amino works as a secretary for TEN2, an advertising agency. One day while cleaning the conference room, she is surrounded in light and finds she can't leave the room until she solves a puzzle. It seems a creature named Hacchin is a being from another dimension called Quizn. He is interested in the intellectual pleasure that happens when someone solves a puzzles or uncovers a mystery. And he has his sight set on Tokine Amino.