Kai is Risaki's younger brother and the last member of the Drama Research Society. He was drafted against his will by his sister at the same time Mugi joined. Thus, the two of them share an odd friendship since both do not really want to be members of the club. Later on, he gradually develops romantic feelings towards her. Kai often gets forced by his sister to do things for the club at the expense of himself.   (Source: Wikipedia) 

A transfer student Asai Mugi is a painfully shy girl. She is so shy that she can't speak when she becomes seriously nervous. However, for some reason, she is spotted and recruited as a member of the drama club.<br><br>
(Source: AnimeNfo)

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**Non anime roles**
- Brant - Wuthering Waves (VG) 

Mugi Asai is an extremely shy girl, so shy that she becomes tongue-tied and even passes out when she has to speak in front of even a few people. Upon entering a new high school she is unwittingly pressured into joining the Drama Research Society, and due to the low number of members must act in a number of roles over the year. 

Kai Nishida