"Papyco" me fait penser à cette merveille qu'est Boku no Pico. 
http://myanimelist.net/anime/1639/Boku_no_Pico Je vous gratifie aussi du synopsis de deux épisode tiré de Wikipédia :
Pico finds a boy named Chico swimming nude in a stream, and the two become friends. Later at Chico's house, Chico takes Pico to his attic, where the two spy on Chico's sister masturbating. Pico then shows Chico that boys can also do this, and the two have relations with each other.
Pico and Chico meet a cross dressing runaway named Coco who lives in a fort underneath the subway. Pico slowly begins to fall in love with Coco, causing him to question his feelings for Chico. The situation becomes exacerbated when Pico catches Coco and Chico having relations one night. Eventually, they reconcile, having a threesome atop Tokyo Tower.
J'adore la conclusion.
Un pote a regardé aussi Tokyo Magnitude, selon lui c'est nul, comme tout animé qui ne lui passe pas l'envie de fumer, après je ne sais pas si on peut se fier à ce jugement, un autre pote m'ayant vendu la série comme très bonne. 