In the beginning his love rival kinda ran him over by accident so he took this opportunity to get back at him and use him as his nanny until his leg was fully healed (get food for him, carry him...). Still, he's not like other douchy ML's who would use it to threaten their MC. They were love rivals in high school and were used to bullying each other (ML bullied MC because MC flirted with Shen Li and MC was the only one with enough balls to stand up and fight back against the little lord. Still, they never brought adults or parents in their fight. Just a brat and a more mature kid brawling against each other while going after their first love.)

Talking about their first time I would say no. He did not r*pe the MC. You have to keep in mind that Shen Li (first love) set the two up by agreeing to meet them on a date in a hotel room after 6 years of neglect. The three men hadn't seen each other in those years and did not know how the others looked/smelled/sounded. Both the ML and the MC were overjoyed that their crush finally reciprocated their feelings and in the dark hotel room they misunderstood the identity of the other person. They started to flirt and kiss while bathing in their happiness. The MC only noticed that it was his love rival the ML when the ML let his pheromones free (the smell isn't important, he just recognized alpha pheromones) + he was called Shen Li. It didn't take much to uncover the mysterious identity of the one on top of him.

The MC did wanted to stop and explain that he wasn't Shen Li. But they were kissing and he couldn't get the words out. After that his omega pheromones burst out of him and he got swept away by his emotions. So in my opinion the ML is innocent. They flirted, kissed, MC didn't/couldn't deny he was Shen Li and although he bit him before they both fell into passion, lovebites do happen in the bedroom. In my opinion their first rodeo was the same as two drunk people in bar hooking up with each other and one getting a bit sober in bed, seeing that the stranger wasn't as handsome as he first thought he was or recognizing an acquaintance but still going on with it because he was drunk (so IQ = zero) and it felt nice.

The MC also acted like it was a one night stand when he woke up. (But he did steal ML's clothes cause he felt that it was to shameful that he lost (bottomed) to the ML and wanted revenge haha.)

The second time you could say that there was dubious consent. This was the first real estrus of the MC and I don't really remember if he had an inhibitor with him, but he did ask the ML to get one. The ML just asked if he wanted him or the inhibitor and well, the muddled headed MC of course said that he wanted the alpha.

I don't know if the ML was sober at that time or not.

You can see that I compare the estrus in this story with being drunk because the MC doesn't really object to it like in other ABO's where the omega is screaming no!!! and pleaasseee and ahhh and blablabla. He does get muddleheaded and of course h**ny so he can't make the right decisions but the way the author describes his thoughts after he woke up does remind the reader of the morning after a one night stand. Yes, the MC is embarrassed that he got topped again by his rival but he isn't really afraid or regrets it. (The forceful kisses when they are sober, however, do make him upset in the beginning)

Also, I could be wrong cause, you know MTL can cause confusion sometimes, but after that the MC didn't have any estrus anymore. The ML did want to bed MC after knowing he was an omega who he was attracted to, but he did not force the MC when he said no. He did, however, forcefully kiss him, he l**ked his earlobe, crawled into his bed as if he owned it and followed him around wherever he went. This did scare and irritate the MC in the beginning.

It wasn't Shen Li but MC

(unlike other MCs he noticed that his friend liked him and handled it very well)

I am not talking about protecting him as in beating love rivals who went too far (altough he did do that). E.g. when Shen Li, mother MC, MC and ML were eating together he noticed mother MC making spicy food. The MC has a weak stomach and couldn't stand spicy food so he took it on himself to go into the kitchen and take over the cooking to protect his little mate

MC is the real grandson of the Shen family, not Shen Li. I did wanted him to leave his ungrateful family behind that forced him to put on a mask of good brother/son. (I disliked the sister not because she was bad but because she couldn't make decisions for herself and was too dependent on her older brother. The mother on the other hand... she deserves to be thrown away with the tr*sh!)

In the beginning the MC didn't really look at the ML as a love interest but as a friend. The MC matured faster than anyone else because he had to work for his own tuition fee/living money and needed to take care of his sick father and the rest of his family. So he was always calm, nice and polite as if he was wearing a mask. Even when he was with his first crush, he wasn't really himself. He didn't care if others forgot about his (dis) likes or even his birthday and always tried his hardest to help others. In other words, he couldn't count on anyone and couldn't be anything else than the reliable brother/son. Only when he was with the ML he could truly become a kid/himself. Fighting back, losing his calm, making fun of each other... Even his only real friend Chen Suo couldn't do what ML did as MC kept his distance and talked politely to him.

When Chen Suo (?) asked him what kind of person he wanted to marry he only described a person with who he could have a stable life with (feelings didn't seem to matter that much? Of course some kind of positive feeling was needed.) Again, a person he couldn't be his true self with.

The ML is the only person who could have made him truly happy. Yes, he didn't fall in love in the passionate way a lot of other protagonists do. (He did however like the handsome looks of the ML) His love is slow. First he started to open his heart to the ML, started to feel this bond of trust between them and suddenly the ML was the first one he thought about when confronting a problem or when he needed someone to talk to. (Before that it was Chen Suo (?)) The MC was afraid to lose this and didn't want to invest any feelings in the rich master because he didn't wanted to have a fling or just any relationship. He wanted a marriage. But after the ML has proven his love was real, he wanted to give them a try.