In my opinion, Azusa’s Lovedoll – Azusa & Kasumi (5 Player Anims, 2 NPC Anims)
5 Player Anims:
3 Player Anims: Masuo × Kasumi (Bathroom) (Backyard 1 & 2 positions) (Mei’s House)
2 Player Anims: Masuo × Kasumi (Class 3-2) and Masuo × Azusa (Girl's Toilet) (University Map)
2 NPC Anims:
Azusa × Kasumi (Storage Room) (University Map)
Azusa × Kasumi (Class 3-2) (University Map)
(**or maybe I missed something**)