KOUTAISHI TO KON’YAKU SHITARA YOMEI GA 10-NEN NI CHIJINDA NO DE, NAZO TOKI HAJIMEMASU!
Other names: 皇太子と婚約したら余命が10年に縮んだので、謎解きはじめます!, After Getting Engaged to the Crown Prince, My Lifespan Was Shortened to 10 Years, So I'm Starting to Solve the Mystery!, Kotaishi to Konyaku Shitara Yomei Ga 10 Nen Ni Chijindanode, Nazo Hodokihajimemasu!