Deaimon: Recipe for Happiness

A regular customer cancels their order. Nagomu's father, Irino Heigo, is furious with him, thinking that Nagomu has done something again. Heigo and Nagomu go to apologize to their regular customer. There they find out that the cancellation was actually connected to someone else who works at Ryokushou, Seto Saki.

On a day off from work, Itsuka and Mitsuru run into Nagomu's ex-girlfriend, Matsukaze Kanoko, in town. Mitsuru and Kanoko haven't met before, though Itsuka knows them both. The three decide to have lunch together. Mitsuru and Kanoko both get excited talking about Nagomu while Itsuka is perplexed by the unusual atmosphere between the two women.

Everyone at Ryokushou is participating in the Miyama school district's sports festival. Itsuka feels shy and awkward around Nagomu, causing her to adopt a brusque manner toward him. But in his loud cheers of encouragement she feels the warmth of family. Nagomu's father, Heigo, gets overly fired up and ends up hurting himself. Nagomu and Itsuka have to step up to take his and Nagomu's place in the parent-child event. Meanwhile, at Ryokushou, a woman calling herself Itsuka's mother appears.

Kanoko followed Nagomu to Kyoto, but back when they parted ways, she'd been stubborn and said, "I like Western sweets better." Faced with that, she can't find a way to be upfront and cheer Nagomu on now. Meanwhile, Nagomu begins kicking up a fuss about losing his headgear from his band, Chestnut Manju. With Kanoko and Itsuka's help, Nagomu searches for it, but...