Yosuga no Sora - In Solitude, Where We Are Least Alone. - Vol. 2 Ch. 10 - ...Yields No Progress

[MangaDex]

 

[147013]

How fucking dense is this man.

 

[A11isay04]

I mean they are brother and sister so it was goos that he was dense af

 

[DrBuns]

How fucking dense is this man.

Even if he liked her like that, he's her brother. Her being nice to him like that could almost 99.99% of the time be contributed to her trying to be a good sister. So he really isn't dense, not in the slightest.