Borderline

My sexfriend can't be this cute.

"The boundary between artificial and natural, love and affair, man and woman..." It's also borderline Vanilla <br>Also Okumoto Yuta boob art never fails to amaze me.
Oh, added the vanilla tag

This felt so sweet on both sides...I love the girl protagonist so much <3

This _so_ needs a sequel where they actually get properly together. She's way too much of a bombshell for him to not try and actually win her over the rest of the way, and she's clearly opening up to that given how she reacted to his "girlfriend." :)

Of course, given that this is hentai, the fact that the other girl was his younger sister doesn't actually mean that she wasn't his girlfriend. ;)

Almost looks like if it was a Re-Life doujin. Kinda like what wouldve happened if the main characters met back in the past.

wow that was amazingly hot and cute at the same time

She probably feels sorry for never paying on their dates because she's an office lead with a good salary. I can imagine her being the cool beauty type boss.

Ahh..the good old cool beauty sex friend that gets jealous seeing her plaything with another girl only to find out it was the dudes sister and now they dating....personal fave

Fantastic, and what a bombshell.

It's borderline sadistic to not let us know what she said. I mean, we all know her response, but stil... Or it will be revealed in a sequel?
By the way: classic usage of the sister misunderstanding!

There I was expecting the comments to be filled with creepy requests for a sequel featuring incest between he and his sister!

i freaking love Okumoto Yuta work!!!

wtf... second story for a day missing vanilla tag?

What is the boundary indeed...This felt kind of like borderline Vanilla.
Getting jealous over seeing him with another girl, and then calling him over for sex immediately after? I'd say that means he might have a chance.
Great ending though. I like how his confession was...Silent. Kind of made it more dramatic, and considering her reaction...I'm sure he might have a chance. Definitely cheering him on though.
Also, sister, eh? Despite knowing that, I think would have liked to see her have a scene as well...Though I'm certainly happy enough with what was provided here.

Quick GodsHandonEarth pray as hard as you can to your deities of sequels for me.

Little Sister unknowingly engages Relationship Upgrade ... APPROVED!

Start once again practicing for the inevitable arrival of a tankoubon by Okumoto-sensei ..... CHA-CHING!!!!!