Boku no Pico RPG - Aged Up

Pico: A blonde-haired boy who works a summer part-time job at his grandfather's bar. He is often portrayed swimming, usually naked or in a blue Speedo. He has worn girls' clothes ever since Tamotsu (Mokkun) gave some to him as a gift. Later, feeling hurt that Tamotsu would not define their relationship, he rebels by cutting his hair and running away from home, although later on they reconcile. The following summer, Pico meets Chico, who is swimming naked in a stream, while riding his bike. He soon becomes friends with Chico, who calls him "Oniichan" (big brother), and they form a romantic and sexual relationship. In his relationships with both Mokkun and Chico, he is the uke, though in the latter relationship this is somewhat reversible.

Chico: A brunette boy who lives with his older sister in a large house in a secluded forest area and develops a sexual relationship with Pico in the second episode. He is younger and less sexually experienced than Pico. He often plays in the outdoors nude and secretly watches Oneesan masturbate. In most cases, Chico is the seme, despite his age, though his relationship with Pico is somewhat reversible.

Coco: is a feminine-looking boy with long, black hair whom Pico and Chico meet in the third episode. It is subtly implied that Coco is actually a so-called "city fairy", due to some strange minor occurrences in his vicinity, though this is never explicitly confirmed. Coco soon has sexual relationships with both Pico and Chico. After inadvertently causing some friction in their relationship, Coco decides to distance himself from Pico and Chico, though they do reunite with him at Tokyo Tower and end up having a threesome. He is also the main uke of the three, but this can be reversed.