The Genius Prince's Guide to Raising a Nation Out of Debt, Hey, How about Treason? Novel Vol.3 (US)

After narrowly dodging a marriage proposal (for the time being), Prince Wein is accosted by a messenger from the Kingdom of Cavarin, which can only mean bad news. Though he accepts their invitation to join their religious festivities, this treasonous prince's top priority is to not attract more fame.