Made with TechArts 3DCG sp 4 & fanpack.
Ren is from the hentai Akiba Girls. In it, the hero Nikita witnessed a terrible accident that killed his parents as a boy. He becomes an eroge otaku because of this. His stepsister falls for him (they're not related by blood) but she has some anger management problems. Ren comes in and he falls for her. Not until the end of the anime do we find out Ren is an angel though. Along the way, he gets involved with a rabid cosplayer and a voice actress. In the fourth episode, Nikita is sitting around hungry when Ren comes in and cooks him a meal. Then they have sex afterwards.
Fun fact: Ren's name can be translated as "inexperienced passion."
Akiba Girls copyright Studio Milky.