皇太子と婚約したら余命が 年に縮んだので、謎解きはじめます

Shaliaze has the ability to see the remaining lifespan of herself and anyone she touches. However, the moment she signed the engagement contract with the Crown Prince, her lifespan, which was supposed to be 70 years, suddenly dropped to just 10 years! When she tried to proceed with the annulment of the engagement, she discovered that not only her lifespan but also the lifespans of her relatives were reduced as well. With no choice left, she must find a way to regain her lost years while maintaining her position as the Crown Prince’s fiancée!