A miscarriage that's portrayed as quite tragic for the MC. He does get a baby in the extras though and forms a happy family with the ML.

the MC's brother rescued him at the cost of his own life.

the MC overhears half a conversation and despite having absolutely zero proof that the ML would marry someone else or could imp**gnate someone else, he decides this is the case, instead of the logical conclusion that the ML wants to marry him.

Seriously, how dumb can you be? Even with low self-esteem, logically there's no way the ML could have a fianc

e that he had slept with. Maybe if their relationship was more ambiguous or the ML didn't show his affection so much, but let's look at the facts. Since they slept together the first time, the ML has:

• continued to seek out the MC and cared for him instead of just using him for s*x - like staying over at the MC's place, having his bodyguards keep sending him food
• stalking him (the only part I wasn't fond of in the courtship - if you like someone, just ask him out, maybe he wouldn't go on a date with someone else if you told him you want to date him, and stalking him is creepy) and preventing him from dating another person and taking him home when he's drunk (still stalking and only okay because the friend is tr*sh and the MC's self-preservation level is close to zero).
• taking him to work and picking him up every day, changing his schedule/staying up late to talk to him for a whole week
• taking him on dinner dates, romantic kisses, giving him flowers
• checking up on him, telling that he can't stand being away from him
• taking him to his home and asking about his opinion for a new house and how he dislikes living alone (the MC totally did not understand this very obvious hint though)
• comforting him emotionally
• finally taking him to meet his parents and telling him how much his parents want to give him a good impression of them and think it's important to meet him

Also the ML spends all his waking hours either at work or meeting with or talking to the MC. There is simply no time left over to woo someone else. So the MC here is being too dumb here.

outright propose because of the MC's fragile mental state, which he is very aware of and tries to accommodate by talking it slowly

That led up to a slight misfortune. The looming dark tone near the end almost made it seem like it'll be a BE. But what exceeded my expectations is that Sung Hoon knowing his lack of emotions tried counseling just to accomodate Seo Yu's emotions after what happened, its my first time encountering the ML making this kind of effort, its noteworthy.

It started off good and had potential, though the translation made it awkward in places. I was expecting dark but healing story that will make me feel emotional. Instead we get a typical cold face paralysis dominant alpha with typical overwhelming skills and stamina in bed. Their relationship kinda came out of nowhere (as usual the cold ML falls in love very quickly without it making any sense), but I could still take all of this but... While the MC seemed kind of smart in the beginning, just depressed and crippled with low self-esteem, as the story goes he seems more and more dumb. Some things might have gotten lost in translation but as is, I'm not sure how he even managed to stay alive til the starting point of the story instead of ending up beaten up to death by one of his shitty exes/rich scum his uncle sent him to bed with.

There is not much of communication between MC and ML because MC is very insecure in their relationship (thinks they are just flirting and sleeping together) due to his past experiences (he seems to have a lot of shitty exes that he doesn't cut off and his one long-time friend is of the toxic kind) meanwhile ML as a typical rarely-talks-cold-to-everyone-but-MC has long assumed they are in a relationship but never felt the need to express this with words. As the story evolves, ML treats MC like a pet and even talks about it but MC is too dumb to understand. He takes care of MC's troubles by disappearing people behind his back and keeps him in the dark. This may get better as the story goes but I just really don't like stories where MC is treated/raised like a cute pet that can't think for himself and needs to be taken care of. And COMMUNICATION IS IMPORTANT.

One character I really liked was the omega cafe owner. He seemed really sweet, crushing on our MC for years and not being discouraged even after finding out they are both O. And he seemed genuinely happy for MC to be happy to be with ML too. I really hope author doesn't villainize him later in the story because of his one-sided love as he was truly a sweet and kind person in MC's life who never tried to force his affections on thim while he was too dense to see it. If he didn't wait in inaction for years, in alternate reality this could have been an OxO healing story. But well, that's not this book.

The only thing in this story which I find not necessary is his miscarriage of his first baby. (I need more fluff and babies).