Release Date: September 15, 2020

Contents of standard version
- 1 CD
- 1 Photobook (72 pages)
- 2 Photo Cards (random out of 33 types)
- 1 Postcard (random out of 2 types)

Contents of limited edition
- 1 CD
- 1 Photobook (72 pages)
- 2 Photo Cards (random out of 33 types)
- 1 Post Card (random out of 2 types)
- 1 Frame Photo Card (random out of 8 types)
- 1 Door Hanger
- 1 Panorama Poster (random out of 2 types)

Track List
- 토끼와 거북이
- Back Door *타이틀
- B Me
- 아니 (Any)
- 미친 놈 (Ex)
- We Go (방찬, 창빈, 한)
- Wow (리노, 현진, 필릭스)
- My Universe (승민, 아이엔 Feat. 창빈)
- 神메뉴
- Easy
- Pacemaker
- 비행기
- 일상
- Phobia
- 청사진
- 타
- Haven

IN生 (In Life) OverviewIN生 (In Life) is the first repackage album by South Korean boy group Stray Kids, released on September 14, 2020. This album serves as an extension of their first studio album, GO Live, and features a total of 17 tracks, including the title track "Back Door." The repackage includes eight new songs alongside previously released tracks, showcasing the group's diverse musical styles and themes.

The album was produced by the group's members Bang Chan, Changbin, and Han, collectively known as 3Racha, who are known for their significant contributions to Stray Kids' sound.

Upon its release, IN生 received positive acclaim from fans and critics alike, praised for its innovative sound and lyrical depth. The album's title track "Back Door" was particularly noted for its catchy melody and engaging choreography. Commercially, it performed well on various music charts, solidifying Stray Kids' growing influence in the K-pop industry. The album's physical release included a photobook, photocards, and a postcard, enhancing its appeal to collectors and fans.