The Angel Next Door Spoils Me Rotten, Vol. 6 (light novel) by Saekisan

HER SMILE IS HEAVEN. Back in his hometown, and with Mahiru’s support, Amane is finally able to confront his bitter past head-on. He’s so lucky to have a girl like her by his side, and as he watches her cheerfully accept his parents’ affection, he becomes all the more confident that he wants to stay with her forever. A couple at last, the pair share plenty of sweet, touching moments until, as their vacation draws to a close, it’s time to make memories at the summer festival! But amid so much joy, someone from Mahiru’s past makes an unlikely appearance…