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I don't know if this is right but I'm pretty sure that part is in this manga in a later chapter (I think it was chapter 9)
http://www.mangago.zone/read-manga/p_to_jk/
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I'm pretty sure that its a part of this manga but I'm not positive. I think the part you are talking about happened around chapter 9
http://www.mangago.zone/read-manga/p_to_jk/
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hi ,,, may i know which yaoi manga did you saw that scene which is originally from P to JK
http://www.mangago.zone/read-manga/p_to_jk/
Hi there! I'm looking for this manga where MC was always fighting with his dad when he was a teenager. The dad was a cop and MC always wear earphones to stop listening to the other. But on day, because of that, he didn't listen to his dad who was trying to stop him from going in an alley cause there was a killer there.
And at the end the dad died to protect him. This scene his from a flash back in a yaoi manga ! Thank you !!