Ch 1-3 I literally was searching for a manga that has this kind of plot, I was making a fake scenarios and thought about what if they were best friend and then they were having a threesome but instead of focusing to the girl they both ended up kissing each other in the middle of doing it and then BOOM I found this manga that has exactly the same plot that I was thinking and honestly I FRICKIN LOVE THIS
Ryuuku Ai Utsu