@I love sweets  hahahaha,well i can i give you the full bean😉 i might wrong a few parts so bear with me😗
For the part how does the revenge unfold, mc ask help to the person in this chapter to tell the reporter about his true will (this part actually i am not sure). Mc later will go to his estate (the one he got pushed) to find his will (the funny things is mc's fam really ransacked the place but somehow never check or flipped the bed😂) mc say he is someone who keep value things near him so he hid it inside his mattress. Then he go to balcony where the tragedy happen and check his bird feeding thingies where he installed camera (he love watching birds) and somehow that become a concrete evidence for his death.Â
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For the person who knows about his condition is one of offbeat member, i forgot his name, that went to jeju (?) and mc followed him afterwards. Mc doesn't tell him at first but he somehow caught it and later mc spilled the truth. I don't remember where he met mc for the first time and kinda got instinct that they have met but mc denied it, then second time is when mc left the ise's house (the one where mc confront ise f2f) and the jeju guy kinda confident mc is the ise he know and asked mc. Jeju guy ask if he want to tell other members but since even jeju guy have hard time to believe it, he don't think other members will believe him so he doesn't tell.Â
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That's all that i could remember, might be wrong in few parts😬