I will use analogies since I struggle to articulate.
I really really wanted to like this one, but it felt so hollow. I wanted to see more character building, like his life training as heir, world adjustment, struggles, fears, or before he was found, his past in another world. I don't know why he does anything; his drive. The only reason given is that he is quirky. He's flawless and gets whatever he puts his mind to. It's also very Gen Z-coated. One example is when the main character said whoever wins the fight gets to top. Tick tock trend! This was also very boring at times. They rush through all these interesting ideas without letting anything marinate or sink in. Also, it had that weird fan fiction feel where the 2 main characters are the only ones that exist, and the world is just a setting for their romance. Characters were dismissed as quickly as they were summoned, and they just threw facts around, like "you've read transmigration fantasy stories before, you know how that works".
This isn't my first time seeing a bottom that's able to kick ass and take care of business, but I wish this could have been one of my favorites. I can only describe the MC as much as a stranger could infer from a first impression. He's strong physically and mentally, confident, and smart. I like that the main character is not like other girls, but we were just checking items off the quirky list. His spontaneity, which no one can understand with a sexy appearance, makes him like an (unproblematic) manic pixie dream. But he should be more. All of the world-building was given to us in microdoses. This is a (very thought-out, maybe) bag of tropes with little substance.