>>280443247He doesn't need to
Marin literally is all over him
>>280445358You're missing where Mai runs toward Sakuta in the Knapsack kid movie, because people had forgotten about him, yet she remembered because of the marriage papers they both signed.
Haven't watched Flowers yet, but it looked cute and I've heard great things.
A Sign of Affection is also quite good where the girl goes toward the protag.