During Chapter 3 of Like a Dragon: Ishin's story, players have the chance to complete a substory quest called The Mochi Mystery for optional rewards. A comedic tale about stolen dessert, this mission forgoes combat and instead asks players to use context clues from a list of suspects to expose a thief. A far more lighthearted tale when compared to the dark atmosphere of the main story, this quest offers a fun diversion from the main adventure while also giving players Virtue and a special item for solving the mystery.

https://screenrant.com/dragon-ishin-mochi-mystery-quest/