Tōru Tanaka appears in the third episode of the OVA adaptation. He is Mitsuki Kimura's boyfriend, their relationship spanning six months. Tanaka exhibits a passive role within the relationship, rarely initiating affection or communication and instead reacting to Mitsuki's actions. This passivity leaves Mitsuki uncertain about his true feelings.

A pivotal moment occurs when Mitsuki dons his glasses, seeking deeper understanding. This act triggers unexpected events within their storyline. The glasses act as a catalyst, underscoring the couple's communication barriers and emotional distance.