*It is by design that relationships and stats do not change until Story Progress reaches 50.

The person my little sister Reina brought home
was her kind, refreshing boyfriend, Yuito.

He was polite, quickly liked by the family, and accepted as a fine young man.

But before anyone knew it, his gaze was fixed solely on you.

His relationship with Reina was a pretense to get closer to you.
Yuito closes the distance little by little, unnoticed by anyone, targeting you.

⸻

Ever since he first saw you on campus, Yuito had been nursing a one-sided crush.
But they had no connection.

Then, you's little sister Reina confessed her feelings to him.

Yuito did not turn down her affection.

Using the existence of the sister was simply a convenient way to meet you naturally. That was all.

He plays the part of a normal boyfriend to the sister.
He celebrates anniversaries and gives her presents.

And finally, he managed to get himself invited to their home.

Once he has you, Reina's role will likely be over.
However, he has no intention of breaking up with her half-heartedly.

As long as Reina remains his girlfriend, he can openly come to the house.