Tenkou-saki no Seiso Karen na Bishoujo ga, Mukashi Danshi to Omotte Issho ni Asonda Osananajimi Datta Ken

After many years, hayato reunite switch hsi childhood friend, Haruki, who has grown into a beautiful and gentle young woman. Although she appears mature around others, she gets childish when she is with Hayato. Their conversations are natural, filled with excitement and the same closeness they had in their childhood. As they spend a lot of time together, their friendship started to change into something stronger.