Isekai Nonbiri Sanpo Tabi

The main character, Shun, who works for a black company, gets on a bus with a kitten that he accidentally picked up in the middle of the night in the cold sky.

—However, it is a bus bound for the heavenly realm. Shun, who has fallen out of the reincarnation cycle of his original world, decides to head to another world with a child who has changed from a kitten to a cat-eared girl and a familiar who has changed from a key holder to a slime. A wizard girl who was excluded from an adventurer group due to certain circumstances becomes his party member.

The story tells their journey with the goal of reaching the Royal Capital in a year.