Hazure Skill The Guild Member With A Worthless Skill Is Actually A Legendary Assassin (Manga) Vol 04 (Mature)

When Almelia, the hero Roland accompanied on their quest to defeat the Demon Lord, suddenly receives a marriage proposal from a prince of a neighboring country, the King tasks Roland with escorting her to her potential groom. However, the motives behind this proposal seem suspicious, and it's up to Roland to get to the bottom of it... Yen Press
(W) Kennoji (A) Fuh Araki, Kwkm