Im looking for a bl that i read in manga toon

So its like theres this red headed kid that was adobted by this dude by mistake cause the dude was hiring a worker, the dude tried to bring back the kid to the orphanage but decided to adopt him because the kid doesn't wanna go back and was persistent, a few days later the did did something bad and the kid thought he was gonna get punished and thats when it was revealed that the kid was being sa'd by the caretaker of the orphanage when the kid though his punishment was giving the dude a blowjob, dude was furious and asked the kid where did he learn to do such thing, and thats when he found out that it was the caretaker's fault, and thats what i obly remember (oh and dont worry, the kid didn't blow the dude off the dude push the kid off of him before he even tried to ooen the dudes zipper)