Hitochigai kara Hajimaru Koi mo Aru (2024)

Similarities:
-the format is a series of short clips
-sweet and lighthearted series. The vibe is similar.
-a stupid (but entertaining) reason makes the main character get to know the male lead. In one series the main character pretends to be his twin and has to break up with his twins boyfriend. In the other series the main character makes a bet with the the male lead that he can make him fall in love with him first, in exchange for him doing his project.
-a hidden agenda that is the same
-a male main character who has no interest in the other male lead at first but who changes their mind after having more romantic interaction that the male lead provide.

same premise. the mc has to pretend they are their twin sibling and break up with their partner and somehow they start having feelings for them