Otherside Picnic by Miyazawa Iori and Mizuno Eita — Ongoing

Also known as Urasekai Picnic

29407v5

The story is set in the modern world, but there exist doors that can take people to the "other side," where strange urban legends and internet stories prove to be true. College student Sorawo Kamikoshi finds herself exploring one of these doors, and almost dies on the other side, when she is rescued by another girl named Toriko Nishina. Toriko is a mysterious girl, but very skilled with a gun, and she seems to be searching for someone else on the other side. Together, both girls start to explore these doors to the other side.

Official English localization may be purchased on the publisher's website: https://www.penguinrandomhouse.com/books/667385/otherside-picnic-manga-01-by-iori-miyazawa-eita-mizuno-shirakaba/

Official English localization of the light novel may be found on the publisher's website: https://j-novel.club/series/otherside-picnic

Volume 1
Chapter 1: Wiggle-Wiggle Hunting I released Aug 5 '18
Chapter 2: Wiggle-Wiggle Hunting II released Jul 7 '18
Chapter 3: Hasshaku-sama Survival released Sep 29 '18
Chapter 4: Hasshaku-sama Survival II released Mar 28 '19
Chapter 5: Hasshaku-sama Survival III released Mar 27 '19
Volume 2
Chapter 6: Hasshaku-sama Survival IV released Jul 4 '20
Chapter 7: Kisaragi Station I released Jul 5 '20
Chapter 8: Kisaragi Station II released Jul 7 '20
Chapter 9: Kisaragi Station III released Jul 12 '20
Chapter 10: Kisaragi Station IV released Jul 15 '20
Volume 3
Chapter 11: Kisaragi Station V released Aug 9 '20
Chapter 12: Kisaragi Station VI released Aug 20 '20
Chapter 13: Kisaragi Station VII released Aug 22 '20
Chapter 14: Time, Space, and a Middle-aged Man I released Sep 13 '20
Chapter 15: Time, Space and a Middle-aged Man II released Sep 28 '20
Chapter 16: Time, Space and a Middle-aged Man III released Sep 30 '20
Chapter 17: Time, Space and a Middle-aged Man IV released Oct 2 '20
Volume 4
Chapter 18: Time, Space and a Middle-aged Man V released Oct 12 '20
Chapter 19: Time, Space and a Middle-aged Man VI released Oct 17 '20
Chapter 20: Time, Space and a Middle-aged Man VII released Oct 28 '20
Chapter 21: Time, Space and a Middle-aged Man VIII released Nov 13 '20
Chapter 22: Time, Space and a Middle-aged Man IX released Nov 16 '20
Chapter 23: Time, Space and a Middle-aged Man X released Nov 24 '20
Chapter 24: The Operation to Rescue the US Forces at Kisaragi Station I released Dec 13 '20
Volume 5
Chapter 25: The Operation to Rescue the US Forces at Kisaragi Station II released Dec 2 '20
Chapter 26: The Operation to Rescue the US Forces at Kisaragi Station III released Dec 9 '20
Chapter 27: The Operation to Rescue the US Forces at Kisaragi Station IV released Jan 5 '21
Chapter 28: The Operation to Rescue the US Forces at Kisaragi Station V released Jan 7 '21
Chapter 29: The Operation to Rescue the US Forces at Kisaragi Station VI released Jan 7 '21
Chapter 30: The Operation to Rescue the US Forces at Kisaragi Station VII released Jan 8 '21
Volume 6
Chapter 31: The Operation to Rescue the US Forces at Kisaragi Station VIII released Jan 17 '21
Chapter 32: Resort Night at the Beach of the End I released Feb 1 '21
Chapter 33: Resort Night at the Beach of the End II released Feb 1 '21
Chapter 34: Resort Night at the Beach of the End III released Feb 9 '21 Swimsuits
Chapter 35: Resort Night at the Beach of the End IV released Feb 16 '21
Volume 7
Chapter 36: Resort Night at the Beach of the End V released Feb 27 '21
Chapter 37: Attack of the Ninja Cats I released Mar 19 '21
Chapter 38: Attack of the Ninja Cats II released Apr 22 '21
Chapter 39: Attack of the Ninja Cats III released May 23 '21
Chapter 40: Attack of the Ninja Cats IV released Jul 2 '21
Chapter 41: Attack of the Ninja Cats V released Jul 22 '21
Volume 8
Chapter 42: Little Bird in a Box I released Sep 17 '21
Chapter 43: Little Bird in a Box II released Oct 22 '21
Various Bonuses released Feb 11 '21 Full colour