Wow, last chapter already next time? The drama is too cheap and fell apart at the very end. MC blames himself for "not facing my abilities" and causing the current issue. This falls apart because if you read the entire thing from start to end, MC has ALWAYS faced his own abilities. He's always studying how it works and how he can use it properly for the benefit of the people around him. The only issue with his abilities was that HE DOESN'T KNOW how it actually works. Even Miinya only had skeptical assumptions and even chose to keep her thoughts from MC. NONE of the characters know how MC's skill works. Not even MC himself. It's not MC's fault that he lived his entire life thinking his Heal is just some normal healing magic that restores stuff into their original state. Even if he realized very lately that he can "upgrade" stuff by healing them, it doesn't mean that he already completely knows how the entire thing works including the side-effects. The drama falls apart because it's building up on the pretext that MC kept using his abilities willy-nilly while fully knowing what's going to happen, which in this case 39 Chapters of manga says otherwise.