Danjo no Yuujou wa Seiritsu suru? (Iya, Shinai!!)

In Danjo no Yuujou wa Seiritsu suru? (Iya, Shinai!!), Yuu Natsume meets Himari Inuzuka in middle school while trying to sell accessories made with preserved flowers. After Yuu tells her about his dream of opening a shop for his creations, Himari decides to help him. By their second year of high school, Yuu is selling his accessories online with Himari modeling and promoting them, and their easy partnership has grown into an unusually close friendship. Himari even declares that if Yuu's ambition has not come true by the time they turn thirty, she will marry him herself. That balance begins to change when Yuu meets Rion Enomoto, a girl wearing one of his first designs. Yuu and Rion met as children years earlier, and she was his first love. Hoping to pull Yuu out of his creative slump and find him a wife in the process, Himari pushes them together. For the first time, someone besides Himari understands Yuu's talent and wants to be friends with him. But as Rion and Yuu grow closer, Himari finds it harder to keep her own feelings for her best friend in check.