: Original Video Animation, a term for anime released directly to home video formats rather than broadcasting on television or premiering in theaters.

OVA series, specifically the three episodes often referred to as " " (or "Pico x Chico" and "Pico x CoCo x Chico").

CoCo leads them to his home, a surprisingly cozy hideout in an abandoned underground railway station. There, Pico discovers CoCo’s true sex. As they spend the night, both Pico and Chico separately become intimate with CoCo. This leads to a rupture in the boys' relationship when Pico, feeling jealous, catches Chico and CoCo together. CoCo, sensing that he is causing a rift, decides to vanish.