Yuuwaku Countdown: Akira / Countdown: AKIRA

Adaptation of the manga of the same name Yuuwaku/Countdown by Utatane Hiroyuki was released in two parts "Yuuwaku Countdown" and "Yuuwaku Countdown: Akira" by studio PinkPineapple. 

The hentai tells about the life of a handsome and smart guy named Akira. He is so handsome that all girls and guys wouldn't mind sleeping with him, which our hero often takes advantage of. The only girl Akira loved and wanted will never be his, as she is his own sister. Soon our hero meets a hyper-sociable girl Kaname, who sharply condemns his shameless behavior, thereby arousing his genuine interest.