It's a manga about a little sister sucking on her big brother's penis
(SC41) [D.N.A.Lab., ARESTICA (Ariko Youichi, Miyasu Risa)] MIDNIGHT ESCALATOR (Persona 4) [English] [sirC]
[Kaiki Nisshoku (Ayano Naoto)] Gekka Tonbo (Kyoukai Senjou no Horizon)
(Comic Castle 2005) [Misty Isle (Sorimura Youji)] SMBC 3rd WEAR
http://Koi wo Suru no ga Shigoto Desu - CH2
[Fuuraibou Toraya (Shirakawa Raizou)] Buta to Gorilla [Digital]
(C87) [NyankoPi (Kuwada Yuuki)] Sukitte♥Iitai [Chinese] [脸肿汉化组]
Sono Kanjou no Na wa
立ち止まって、すこしだけ
(C83) [Number2 (Takuji)] Yami to Mikan no Harem Project (To LOVE-Ru) [Chinese] [脸肿汉化组] [Decensored]