Reika Matsubara

She is a popular senior in school and have a 'lesbian' relationship with Yuki and Riru separately, which people do not know. She was already in a relationship with Yuki, but did not have the heart to reject Riru's fond for her, which causes Riru to suspect a third party in their relationship.

Akihito was asked to investigate on her on Riru's request.

Seiyuu:
Erena Kaibara (海原 エレナ)