第 4 集: 外星人空仁志成為生物老師以研究人類，同時陷入三角戀。

4

Hitoshi Sora, the alien who brought Hazumu back to life, begins to work at Hazumu's school as a biology teacher to observe human beings. Later, Hazumu goes out shopping with Yasuna and they end up going to a karaoke bar. Conflict begins to arise in the form a love triangle between Hazumu, Yasuna and Tomari after Tomari sees Yasuna try to kiss Hazumu at school one day. (Source: Wikipedia)