Aikatsu!

Johnny and the Bride (3x38)

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After Akari and Sumire are requested for a wedding-themed event, they overhear Johnny discussing an upcoming wedding over the phone, jumping to the conclusion that he's getting married. Curious about Johnny's assumed bride, the girls follow him to Dream Academy, where they meet with Seira and the other DreAca students and hear about how their careers have been going, before spotting Johnny dancing with Tiara, assuming she is the bride in question. Wanting to congratulate Johnny, Akari and Sumire agree to perform a concert at the wedding. There, they discover the one getting married is actually Johnny's younger sister, Elisa, with Johnny having merely taken lessons from Tiara in order to dance with her.