Two introverted otaku friends with big butts are testing each other's knowledge learned from erotic comics, then escalating to doujinshi-style anal licking fantasy sex, finally ending with anal ejaculation. Sengoku Monaka LULU-378

This story tells of an introverted otaku couple who become friends through their shared love of 2D and build a perfect relationship using knowledge gained from erotic comics. They explore each other's bodies, licking and sucking every inch of each other's bodies! Their interest in anal sex is insatiable, and during primal anal sex, they ejaculate multiple times inside each other's anuses! The introvert's endless lust escalates with his moans! The two, with no normal sexual experience, are immersed in the pleasure of repeated anal sex and orgasms, moaning incessantly!