らくらく冒険者の幸せ異世界ライフの独立拡張～旅仲間の冒険盟約～ (Rakuraku Boukensha no Shiawase Isekai Life no Dokuritsu Kakuchou ~Tabi Nakama no Bouken Meiyaku~)

らくらく冒険者の幸せ異世界ライフの独立拡張～旅仲間の冒険盟約～ is a standalone expansion for らくらく冒険者の幸せ異世界ライフ, that can be played with 1-2 players by itself, or combined to play 1-6 players in a single game.

The players are reincarnated into a fantasy world, where they have one year to compete for the happiest life with their partner. Each round/month, players choose to either go on a quest and acquire resources, or to spend those resources to build and upgrade facilities. At the end of each season, players can spend resources to go on seasonal events with their partner. Once a full year has passed, players add up their victory points, with the winner being declared as having experienced the most fulfilling time with their partner.

This expansion carries the identical theme and gameplay as the base game, but includes an array of new content to increase variety, such as new partners and jobs, more monsters, and a set of special events exclusive to each partner, including the ones from the base game.

This expansion also includes the new partners as NPC adventurers for games with lower player counts, integrating with the NPC adventurers introduced in the 冒険者たちの間奏曲 mini-expansion.