Sakata Gintoki is a samurai living in an era when samurai are no longer needed.
To add to his troubles, oppressive aliens have moved in to invade. Gintoki lives with Kagura and Shinpachi, taking on odd jobs to make the world a better place... and to pay their rent.

Volume 24 contains Bankara (ばんから)
Volume 38 contains 13 (サーティーン)

One-Shot by Sorachi Hideaki(author of Gintama) Originally published as part of the Top of the Super Legends one-shot series, It was included at the end of volume 38

Sakata Gintoki is a samurai living in an era when samurai are no longer needed.
To add to his troubles, oppressive aliens have moved in to invade. Gintoki lives with Kagura and Shinpachi, taking on odd jobs to make the world a better place... and to pay their rent.

Volume 24 contains Bankara (ばんから)
Volume 38 contains 13 (サーティーン)

4 koma anthology
ASHIHARA Daisuke
ASO Shuuichi
KAITO
KOMI Naoshi
KUBO Tite
NUMA Shun
ODA Eiichiro
SHIMABUKURO Mitsutoshi
SORACHI Hideaki
TABATA Yuuki