Yes, you are right, in real life drunken consent should not be taken lightly... But there can be ocations where its ok to have fun with your partner with whom you trust and have a connection. It is hard to express this through manwhas or even irl series so, never take what you see on the screen as how things work in real life.
They are in relationship.....
you still have to give consent in your own relationship (but i know what you mean)
you can see him resisting multiple times, being in a relationship gives no right for you partner to do this. this has not been the first time where qu cheng disregarded ci nians consent and just proceeded to touch him however he'd like. it's a build up of repeated sexual assualt that I have noticed so many times throughout the storyline, if a relationship is like that all the time, it builds up to sexual abuse. but of course that will never be portrayed because sexual assault is highly romanticized in this manhua.
Rape amongst partners is extremely common, do you genuinely think consent isn't necessary when you are dating? because that is terrifying.
drunken "consent" is not consent. I uphold my morals, this should never be romanticized as it is rape. one party was drunk while the other initiating sexual contact was sober.