MixedCorn's manga / #adopted brother(1)

The three of them are just freaks. I've been looking for threesome manga stories but this one is just so weak with the storyline. But who am I to complain. Spoilers ahead... FL and adopted brother love each other but they can't come out because FL thinks their parents won't approve and yet they continue humping each other inside their house when their parents are around. Here comes the freaky 3rd wheel who was just used by FL to cover the fact that she's fucking her adopted brother. He just straight in went okay with everything as long as he can have both FL and adopted brother and I think he was really just wanting to have a threesome with both of them.