[Found!]
Ch 1 the uke catches his younger childhood friend sleeping with a girl. The uke is a college student and just heard the seme got into his school as well. The uke sleeps over and wakes up in the middle of the night with the friend touching him.
The subsequent chapters are set while they’re both in college and more of these dubcon situations happen in an off campus apartment. Eventually the uke pretends to be asleep as these situations are happening.