The only thing I disagree is that it was a 'little' toxic. He was hella toxic but part of his anger was justified. Dude was dying and treatment he paid for was essentially a placebo. But if I was to use the watermelon chart, he was a completely "black throughout the inside watermelon" then transitioned into a "regular watermelon that is green outside but still red inside", if that made any sense.

I’ve read it in one sitting, after reading the comments. Yes it is a little toxic but it’s not as bad as people make it sound. I’ve read way worse toxicity than this story. No Reason was a horrible manhwa and this story looks like a puppy compare to No Reason.
I really enjoyed this story, it’s a little long thought but very cute a the redemption arc. And for those who think the MC did 180 in only one chapter, I think you’ve read to fast it was clear to me that he was attach to the ML way linger than you think.