She and her sister father is a veterinary doctor and they help their father in the clinic. She and her sister appeared in episode 4.

Koi Chigusa is Voiced by Natsuko Kuwaya.


Koi has a braid and round glasses.


Role in Plot

Nozumu Futami meet them when he takes Billy to the vet clinic after he ate a fax addressed from the Sumireko Ichijō and Kaoruko Ichijō to Nozomu which got it stuck in his throat.


Nozumu Futami

Ai Momoi

Kaoruko Ichijō

Kira Sakurazuki

Mai Momoi

Juntarou Gonda

Miyabi Hinagiku

Mrs Futami

Mrs Ichijō

Mrs Sakurazuki

Rara Hinagiku

Ruru Hinagiku

Sara Shirogane

Sumireko Ichijō

Sōju Shirogane

Ui Chigusa

Yura Sakurazuki


Ichijō Sisters Fan Club

Keisuke Kosaka


Mr Chigusa

Mr Futami

Mr Ichijō

Mr Sakurazuki

Yūya Hiyama


  • She and her sister are in third year in high school.