https://www.mangago.zone/read-manga/cocoon_of_the_heart/ not exactly kidnapping but the seme regrets so much it's rlly satisfying but sad
I can only think of 'Low Tide In Twilight'/ 'Waterside Night'. Good regret and all, but not exactly kidnapping
That one has a very unique plot tbh I wouldn't recommend it for this but lowk valid
It's the same regretful seme trope but ur kinda right it has some heavy shit to it
Bl where seme kidnaped the uke and the uke is so traumatized that he just stops living kind of. Stops talking to seme barely moves when seme is near also i wanna see seme suffer and regret after