Idk if you have read these already but if you meant similar as in with the calculative obsessive not completely red flag ml i really recommend
https://www.mangago.zone/read-manga/why_are_you_so_kind_to_everyone_except_me/
https://www.mangago.zone/read-manga/honey_trouble/
https://www.mangago.zone/read-manga/cozy_obsession/
and not really calculative but https://www.mangago.zone/read-manga/the_world_without_you/ has kinda that vibe too??
If you mean more red string of fate type of stories then
https://www.mangago.zone/read-manga/akai_ito_no_shikkou_yuuyo/
https://www.mangago.zone/read-manga/kimi_no_yume_o_mite_iru/
Thank youuu
Manga/hwa similar to a link between relationships