otp lying in the grass making each other daisy crowns and laughing at how bad they are but secretly loving how cute they look wearing them

Alternatively
Yuushi lying in the grass relaxing and Gakuto sitting next to him, tearing tuffs od grass from the ground and sprinkling them on him

He thinks it's funny and keeps waiting for Yuushi's patience to wear out but Yuushi jist lets him. Then after he's covered in grass. He pulls Gakuto on top of him (surprise!) and rolls them over and hovers over him, quickly brushing all of the grass off of himself onto Gakuto

He gets disproportionately mad about it and pouts even though it's totally what he deserves

He retaliated by putting a bunch of grass in Yuushis hair which actually succeeds in annoying him. He solves this by pulling him into his lap and trapping him there. They stop fighting and start kissing the end