This is a good series so far. The main otaku dude is fairly good looking to be honest. The girls are nice as well. (I like the raven haired one best) The sex is great too. At first it's just his classmate who comes to peruse his extensive Manga library and be his free use sex doll in return. But one day he gets a little fiesty and goes at it multiple times. This is enough to flip the switch in her brain and she finally starts getting off on it. This is the moment it starts getting good. Her voice actress delivers some top tiersex noises.
They start mashing pissers all night long and she comes back for more in episode 2. (This kid either has really chill parents or lives alone) eventually other girls at school figure out what's going on and decide they need this nerd to break them off and see if he's really all that. It's shaping up to be a revolving door of curious classmate dick appointments.
There's even some bits that made me genuinely laugh. Like him saying "excuse me" before sticking it in, like, pardon the intrusion. Or him just saying "get pregnant" right to their face when he busts inside.

One of my favorite series ever, can't go wrong