Heya im looking for a yaoi manga when they use a butt plug Thanks xx

http://www.mangago.zone/read-manga/ten_count/
http://www.mangago.zone/read-manga/hoshi_no_yakata/

what chapter in ten count?

Chapters 18-19

http://www.mangago.zone/read-manga/ten_count/mf/v04/c019/1/