Both movies have like a summer setting and are very beautiful and honestly also kinda poetic, they just have a similar vibe. Both leads have a crush on their best friend.
Sort of coming of age movies focusing on an ambigious relationship between two guys. One likes the other for certain but it ultimately stays one sided.
Both seem to take place in summer too, id also call both poetic.
Both short films focus on two male students and love/friendship. Incomplete is more about friendship while in Grounded the main obstacle is homophobia. Also both movies hurt my soul.