My Dress-Up Darling (Original Japanese Version)

Wakana Gojo is a high school student who dreams of one day becoming a kashirashi for hina dolls. Because his life is all about making hina dolls, he has a hard time fitting into his class since his interests are so different than anyone else's.

After seeing how passionate Marin is about the things she loves, Wakana decides to help her make a cosplay for Shizuku Kuroe-tan from the game "Slippery Girls 2."

Marin and Wakana start to grow closer as he helps her create her cosplay. Though he's happy about the fact that Marin treats him the same way at school as anywhere else, he also starts to worry that others think it's weird that they're hanging out.

Wakana felt relieved just for a moment after they got all of the materials they needed for Marin's cosplay, but then he's shocked to find out that he needs to finish the cosplay in two weeks.

Wakana finally completes the Shizuku cosplay. Marin is super excited that she gets to dress as her beloved Shizuku-tan and suggests that the two of them go to a cosplay event the next day.

Marin and Wakana have a successful first cosplay event. Because of something Wakana said, Marin's mental and emotional state start to change a little. Meanwhile, someone comes to Gojo Dolls after seeing the photos Marin posted of her Shizuku cosplay.

Marin is going to do a group cosplay with her idol, the cosplayer "Juju," as Black Lobelia and Black Lily from the magical girl anime "Flower Girl Blaze!!". Wakana heads over to Marin's home to begin researching the outfits for them.

Juju's photographer and younger sister, Shinju Inui, meets Wakana and Marin for the first time. They're shocked at how opposite her appearance is to Sajuna, but they quickly become closer when they excitedly talk about cameras.

Gojo is able to complete the Black Lobelia and Black Lily cosplays thanks to Marin's help. Marin and Sajuna try on their cosplays and they're both excited about how nicely they turned out, and Marin is even more excited about their upcoming group cosplay.

Wakana and Shinju's secret plan was a success, which added to the success of their first group cosplay photoshoot. As Juju and Shinju look through the photos from the photoshoot, the sisters find out how they both feel.

Liz is a succubus who appears in one of Marin's favorite slice of life series, "SuccIDK." Marin had some interest in cosplaying Liz but didn't think she could pull it off until Wakana gave her a little push. With the cosplay ready, they head to a studio for a photoshoot, but the studio happened to be a rather unexpected location.

Summer vacation is coming to a close. Wakana received an SOS from Marin, who hadn't finished her homework. Wakana helps her study, and then they make plans to go to a summer festival together.