あまえて☆にぃに ～バブみのある妹たちは、兄の×××が大好きです♥

This was the first meeting between the protagonist and his new stepsisters.
Due to their parents’ recent remarriage, the three had become step-siblings—and because of their parents’ work obligations, they were suddenly forced into living together…
Not just cohabitation, but living together entirely on their own, without parental supervision.

The protagonist sincerely wished to get along well with the two girls—but worn out by daily work, he struggled to bridge the gap as he’d hoped.

Then, one day, the girls embraced him—gently stroking his head and cheeks.
“You’ve done so well, Niini… Really well… So please, don’t push yourself too hard…”

The moment he instinctively pulled them close into his arms—
their first true, tender connection as siblings—and something more—began.