
Honestly, I feel like even if our FMC guided Letio in the same way that his love interest in the novel did, the most it’ll do is fix his behavior.
Given how strongly he feels about her and about her relationship with the crown prince, it might turn out that he’ll just bottle it all up inside and scheme his way around situations to get what he wants. I feel like it worked in the novel because his love interest actually liked him back. However in a situation where that’s not the case? All bets are of.

I don’t know about “cruel.” How do you get to move on if you remember every single nine lives you’ve gone through? Not just the joyful moments, but the painful ones, too. If she remembered everything, it would likely hold her back from truly loving and appreciating the current life she has. (I’m also not impressed with the turn the story took after she remembered her previous life with blondie).
Shxt, I’d give her the tea too, if I was that guy. He might not have done it because he cared, but that would be the reason why I would anyway.
Something was ticking me off about her appearance and I realized she’s got a different hairstyle. Please give her the old one back once she’s out of the hospital at least. It’d be nice too if she decided to take self-defenses classes or some shxt. Assuming she’s the female lead.