【FLONTIER COMICS】Sober sister-in-law turned black gal pervert! ～From a recluse to a slut!

The protagonist is in love with his sister-in-law, who is shut out because of bullying.
He spent his days devotedly taking care of her.

One day, the hero tells his love that he’s going to live alone.

He is spoiled because he can’t live without his big brother.

The protagonist has no choice but to make a last resort.
As a last resort, the protagonist decides to turn his love into a bitchy black gal.

The main character has no choice but to take the final step.
[More and more, please make me a bitch!]

By the hands of the protagonist, pure and innocent love is
She’s turning into a bitchy black gal, but…!