From Viz:
A mystical flower offers a prosperous future for its bearer. Determined to find the flower for Nezuko, Tanjiro makes a harrowing journey up a mountain but Inosuke reveals the flower’s true worth. In other tales, Zenitsu recalls the day he battled a demon to save a crying girl, a fortune-teller warns Zenitsu that he’ll die if a girl falls for him, Kanao helps Aoi learn her value apart from killing demons, and when Kimetsu Academy students search for the recipe to win over Mr. Tomioka, Mr. Rengoku ropes them into cooking.

Vol 1: Demon Slayer: Kimetsu no Yaiba—The Flower of Happiness (鬼滅の刃: しあわせの花)
Vol 2: Demon Slayer: Kimetsu no Yaiba—One-Winged Butterfly (鬼滅の刃: 片羽の蝶)
Vol 3: Demon Slayer: Kimetsu no Yaiba—Signs From the Wind (鬼滅の刃: 風の道しるべ)