Responses
Where's the grooming in their past? Teacher Lin has no malicious intent when she helped Youyou during those years of high school, she didn't even reciprocate her feelings and even broke the girl's heart, so the girl pursued her dream, studied hard for years but we all know she truly love her teacher so she came back as an adult and has something to be worthy and proud of.

The dynamic itself is actually pretty promising? Despite the age gap being somewhat concerning, given she was still a 17 year old during the initial story, I do think it could be alright if it was such that Lin Shuo only liked YouYou after meeting her again as an adult. It needs a good execution if the author wants to maintain some moral compass here. Or this can take a pedophilic turn very easily(٥↼_↼) The potential of grooming is making me uneasy too