Goddamn she's so sweet it hurts. I'm a fan of kentas soft spot for kiyo and her lack of awareness for anything outside cooking and sumire but admittedly I was touched by how often sumire thinks of her memories with kenta ... And it ends with her wishing his feelings get across to kiyo ... ahhh!!!
This romance is 100% better than most high-school (age-wise) manga. It doesn't need stupid plots, unrealistic accidents, nor extreme personalities to make conflicts this bittersweet.