see this is where things get annoying because taesoo did take advantage of yeomin being naive, but he fessed up and was honest with his intentions as soon as yeomin started bringing feelings into it. Any pain yeomin feels after this is entirely his fault. taesoo gave him an out, asked him point blank if he was okay with casual meet ups and yeomin lied saying he was fine with it. As a typical bottom mc, I wasn't really expecting him to be smart and grow a spine but come on dude