source from south-plus, bought and uploaded by Crestina,

raw:https://www.dlsite.com/maniax/work/=/product_id/RJ261566.html

EP1:https://e-hentai.org/g/1493060/ea9a09f7fe/

EP2:https://e-hentai.org/g/1495212/f02e49146b/

EP3:https://e-hentai.org/g/1495213/71817ea306/

Crestina:

把同伴女学生变成一个会说话的屁股的第2、第3部
第三部里一个学妹发现女主变成屁股，居然自告奋勇说自己也要变屁股

The 2nd and 3rd episodes for the converting your female classmates to be ass which can talk(???)
The 3rd episode is about your female Kohai told you she wished to be an ass too, Jesus Christ!

Thank you Crestina for uploading the CG I can never imagine why someone will buy that.

Buy the original product to support the artist, and as soon as possible, because there is 50% discount off until 10/07 14:00 Japan time, thank you!

Cover and sample CG:p.1-p.9

Text:p.10-p.72

No Text:p.73-111

py，py它在看书啊啊啊啊

Base +6, 水民驛 +4

你🐎用屁眼看书

Base +2

用屁眼看...
原來是憨總啊 失敬失敬

Base +7

草，把爷给弄笑了

Base +5