Boku no Kokoro no Yabai Yatsu - Twitter comics by Fountains Square (Doujinshi) - Ch. 30 - Oh my dream, once again!

[MangaDex]

 

[Jugglusjuggler]

This is fine too

 

[bigtiddyoneesan]

ONEE-SAN YYEEEEESSSSS

 

[StrawHatCook]

So who's that guy? I've seen him twice now.

 

[starburst98]

@StrawHatCook
He showed up in latest chapter of real manga.

Basically he is a persona.

 

[Spiryts]

Wait wot ? If it's go any further, then onee-chan will score with her otouto before Yamada does it

 

[sighoon]

@StrawHatCook
He is a character from "Kimi iro Octave" the shoujo manga Yamada lent him.

 

[Doomroar]

Greeting her tomorrow is gonna be awkward.

 

[gouder]

Wincest!
My headcanon is that she have smaller tits though

 

[NeroPR]

This is so wrong. We need one for the time he calls Yamada's mother cute

 

[Firsan]

This is fine as long as it's not inserted into the main story

 

[SunnyD88]

Incest is wincest : )