this is 10/10
the ONLY slight remark you can make about this series is how only 2 couples know each other and interact
so you have 2 standalone (cat X hikari; maria X jou) and 2 couples interacting (ryuu X uta; yahiro X hina)
if the 4 couples had interactions with each other, the manga maybe would have had more synergy with the chapters rather than cutting from story to story