Dramas with a ML suffering from a physical/mental illness or a peculiar affection

I'm looking for dramas in which the ML has an illness or a peculiar affection (preferably hidden from the others) under the following circumstances: 

• he keeps it hidden for various reasons; or
• it's not revealed /addressed until later on; or 
• he appears to be in a good condition, but his health issues aggravate;
• he himself doesn't think too about it until later on, but there are signs.

It doesn't need to be the main subject of the drama and I don't mind any genre (doesn't really need to be focused on romance).

I'm referring to dramas like:

• Uncontrollably Fond (2016) - suffering from glioblastoma, a type of brain cancer;
• Doctor John (2019) - suffers from CIPA (Congenital Insensitivity to Pain with Anhidrosis);
• Can You Hear My Heart (2011) - suffers from hearing loss;
• A Beautiful Mind (2016) - suffers from antisocial personality disorder (ASPD).

I'm finding intriguing dramas like these, especially if there is an emotional build up that translates into moments of empathy and concern or even fear of loss towards the character involved. They are just so impactful and makes you appreciate more your relationships and the present moment.

PS: Even if I watched many many dramas, I'm sure I missed out on some, even some very popular ones.

Thanks!