Yep, every girl that has their own route has the kiss scene. In most case it's only once after the confession scene, but on some route they had more than one. I remember Haruka H, Mai L, Tomoe, and Momoko route were those that have more than one kiss scene, Momoko has 3 kiss scenes, IIRC

I was kinda disappointed too that the anime only get 1 cour, making all remaining main heroines to only have one episode to cover their whole story. The lack of proper confession and kiss scene on Sanehara arc last episode are quite disappointing, but for me it's more romantic than Haruka arc, mainly because that scene on the hill (killer pick-up line from Kazuya there X3), boat and beach scene, and the photo board on Hikari's room. But yeah, at the very least they should make Kazuya calls Hikari by her first name on that boat scene