Nah what we meant by that...
Did the uke slept with his stepbrother from all those 7 years that the seme left.
ohhh i seee... now did he sleep with him?? Σ(っ°Д °;)っ
Seems like that since the author said that the seme remained celibate unlike the uke. That's why some concluded that he slept with his stepbro since that author confirmed already that the stepbro is the 2nd ML. And also the author mentioned how he/she hates it when the seme cheats but it's not the case with the uke.
Why are everyone asking if the uke slept with his step bro?? No he didn’t the uke was a damn virgin before he was fucked by seme