お嫁にしなさいっ！ (Oyome ni Shinasai!, roughly "Marry Me!" or "Become My Bride!") is a high-energy Touhou Project arrange track by ARM and Yoshimi Youno of the prolific doujin circle IOSYS. Premiering on their 2007 album 東方萃翠酒酔, the song weaves together four distinct themes from the Touhou series, 赤より紅い夢 (Embodiment of Scarlet Devil), ブクレシュティの人形師 (Perfect Cherry Blossom Stage 3), 恋色マスタースパーク (Imperishable Night Stage 4 boss), and オリエンタルダークフライト (Phantasmagoria of Flower View), into a single relentlessly upbeat medley at a driving 180 BPM. With shout-along vocals performed by miko, Yuka, Mari, and Youko Yasuda, and a playful chorus centered on the idea of marriage, the track captures IOSYS's signature blend of humor, fandom reverence, and high-octane arrangement. The song joined maimai at the launch of GreeN PLUS in February 2014, making it one of the early Touhou Project entries in the series alongside tracks like ウサテイ. Its jacket art carries a piece of maimai history: it reuses the original GreeN PLUS-era jacket of ウサテイ, which shared the same debut album and had its own jacket replaced in the same update. The charts have undergone numerous level revisions across maimai versions, the MASTER difficulty alone has been adjusted seven times, eventually settling at 12+, reflecting the game's evolving difficulty standards. The EXPERT chart was designed by mai-Star, while the MASTER chart was crafted by はっぴー (Happy), who gave it a heavy Slide-note count of 70. The track also appears in CHUNITHM with a longer edit, extending the runtime from 1:54 to 2:18.