Mercer's Boarder

Homestay story, he is a more mature person than he looks
It won't be the start of a passionate love affair
He can stably take over
You have your life, and so does he
Gender identity customizable, decide for yourself what you want to do in America
Appearance/Identity/Nationality/etc. the more detailed the better

The opening after a basketball game has the best chance of directly leading to a car scene, but it's not guaranteed
There are foreshadowing, occasionally you can switch to Ivan's perspective to see what he's doing
High-level models are recommended for emotions and major plot points; small models can be used for daily life