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Reading page 1, "This boob monster with zero respect for boundaries is named Mitani Yuina... and she's our childhood friend."
Me :)

Nothing better then in a osananajimi chapter when they both finally confess their long time love for each other and the proceed to have cute, happy vanilla, confession sex. Vanilla in its pure form.
I desperately need more of Yuina with a ponytail. Especially wearing those panties❤

Just like all of us, Mii-chan was also rooting for a osananajimi victory! An imouto of culture.
Well everyone, vanilla, nee-chan osananajimi victory achieved!!!!

Ah the secret wing sis arrives. Leaving them when they begin to playfully rough house, taking longer to get home to give them time alone, and being genuinely happy when they finally tangle up. There’s proactivity but she played the long game. Keep on winging!

Mii-chan definitely should've been more openly supportive, so that she could be best wingman.

And here I thought Mii-chan was masterbating in her room to the titty monster and we would end in a threesome.

Mii-chan is the best \o/

I want a sexy onee san too!

Nice onee-san

*Chefs kiss* Vanilla in the morning right after waking up. Thanks for the sweet breakfast

Sniff... good work, titty monster onee-san.

Mii-chan: "YEAH!"
Everyone else: "YEAH!" â•­(๑ ॔ㅂ ਂ ॓)Ùˆ Ì‘Ì‘♡

Sexy Onee-san with zero concept of personal boundaries yep this story goes to my favorites immediately!

"Ah, What A Fine Day For Yet Another Story where Older Childhood Friend Grew Up To Be A Sexy Onee-san!"

Between Yuina-nee and his imouto (Mii) who, as it turned out, had been rooting for the inevitable hookup, Ataru had No Hope Of Escape
... granted Yuina had to get rather Assertive so that he would "wake up" and realize that mutual feelings had developed between them.

Yep ... sometimes it's like that.

And it still gets (from me) "APPROVED!"