Rom where the lead has missed most of their adult lives

Like maybe the lead was in a coma, or suffered from anxiety/social/psychological reasons and didn't "wake" up until they where in their thirties/forties before realizing life had just skipped ahead of them. 

• Thirty but seventeen
• 35sai no shoujo
• Cat Street

Heart to Heart 

Flower boy next door

Protect the Boss 

Twenty Again 

The Master's Sun