Kouhei Ueno
上野公平
A bespectacled friend and classmate of Tsubaki. He and Oka have been dating for about a year, but try to keep it a secret from their classmates. Only Tsubaki and Urabe (and later Hayakawa) are aware of their relationship. He often fondly recounts to Tsubaki his experiences with Oka; Tsubaki in turn gets romantic ideas to use on Urabe from Ueno's stories. He also seems to possess a possessive style as he won't take Oka to the beach because other guys will see her in a bikini and jealous when other guys talk to her.
(Source: Wikipedia)
(Source: Wikipedia)
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Mysterious Girlfriend X
Supporting (Role) TV -
Mysterious Girlfriend X: A Mysterious Summer Festival
Supporting (Role) OVA