Shion's anal development was progressing rapidly. In the dark gymnasium warehouse, Shion is suspended by her wrists in a humiliating position, her legs bound and body hanging helplessly in mid-air. Thick liquid is pumped repeatedly into her fully exposed, spread-open asshole. It flows deep into her sigmoid colon, bloating her rectum, until a large foreign object is shoved inside. The overwhelming sensation of her virgin-tight anus being forcibly stretched and torn apart makes her nipples rock hard. Drooling tears and saliva, she cums violently again and again. Her cute little pink bud of an asshole evolves into a lewd, gaping vertical cunt - even sluttier than her pussy - as her anal training is finally completed.