| Kusanagi Kei, a high-school student living with his aunt and uncle, has an encounter with a female alien. This alien is revealed to be a new teacher at his school. Later, he is forced to marry this alien to preserve her secrets. From there, various romantically-inclined problems crop up repeatedly. |
| Name | Character | Episodes |
|---|---|---|
| Chinami Nishimura | Natchan | 12 |
| Rei Sakuma | Miruru | 12 |
| Rei Sakuma | Konoha Edajima | 12 |
| Ayako Kawasumi | Koishi Herikawa | 12 |
| Tomokazu Sugita | Masaomi Yamada | 12 |
| Yukari Tamura | Ichigo Morino | 12 |
| Mitsuo Iwata | Hyosuke Magumo | 12 |
| Kikuko Inoue | Mizuho Kazami | 12 |
| Satomi Korogi | Maho Kazami | 12 |
| Sayaka Ohara | Kaede Misumi | 12 |
| Yutaka Nakano | Principal Tendo | 12 |
| Tomoko Kaneda | Marie | 12 |
| Masashi Ebara | 1 |