I am looking for a webtoon where the stalker is an ugly lonely guy who fell for the popular highschool classmate. He has cameras all over her house. She gets married to someone else, and has a daughter, and stalker watches the family and lives vicariously through them. He does NOT affect their lives.
One day, the daughter gets kidnapped and the stalker with his cameras is the only witness. He solves the case and brings her home.
The story ends with the family being friends with the guy.
https://www.mangago.me/read-manga/stalker/ heres the link
I love how adult Shizuku looks like younger Grandma Tsuchiya and adult Minato with an earring is most probably in a band (like their neighbours). Ao is volume 1 Hazuki.
Them Tsuchiya genes are strong ehehe