[CTW Cayman]"I've Been Killing Slimes for 300 Years and Maxed Out My Level: Witchcraft" and TV anime "Is It Wrong to Try to Pick Up Girls in a Dungeon? V" collaboration confirmed!

The "DanMachi" adventurers to debut soon in SlimeWitch300

CTW Cayman is pleased to announce that its subsidiary CTW Inc. (Tokyo, Japan) is launching a collaboration event between G123's popular browser game "I've Been Killing Slimes for 300 Years and Maxed Out My Level: Witchcraft" and TV anime "Is It Wrong to Try to Pick Up Girls in a Dungeon? V" (abbreviated to DanMachi V). 

Marking the first-ever collaboration event for "I've Been Killing Slimes for 300 Years and Maxed Out My Level: Witchcraft", the characters Bell and Ais from the anime DanMachi will appear in-game as allies. In addition, a variety of collaboration-exclusive items inspired by Hestia and other goddesses are set to be introduced.

Further information about the collaboration will be shared on the official social media channels as it becomes available. Stay tuned for upcoming updates!
Event period: Dec. 26, 2025 (Fri.) to Jan. 15, 2026 (Thu.)

Play the game

 Collaboration character art reveal!

 
▲Bell

 
▲Ais

What is "Is It Wrong to Try to Pick Up Girls in a Dungeon?" 

Based on Fujino Omori’s light novel series of the same name, which has sold over 20 million copies worldwide, the story follows the adventures and growth of young Bell Cranel in a sprawling city built above a vast underground labyrinth known as the Dungeon. 
The anime’s first season premiered in April 2015, followed by the second season in July 2019, the third season in October 2020, and the fourth season in July 2022. The latest installment, “DanMachi V: Goddess of Agriculture Arc,” aired in October 2024.
April 2025 marks the 10th anniversary of the anime, a milestone the series is currently celebrating.
The franchise has also expanded with the anime adaptation of the side story “Sword Oratoria” (2017) and a theatrical release featuring an original story by Fujino Omori in 2019.

"DanMachi" Series Official Portal Site "DanMachi" Series Official Anime X Account

Game Info 

I've Been Killing Slimes for 300 Years and Maxed Out My Level: Witchcraft

Genre: Laid-back Battle RPG

Price: Basic free (in-game item paid)

GameStart

GameStart

What is "I've Been Killing Slimes for 300 Years and Maxed Out My Level"? 

Based on the light novel by Kisetsu Morita, the series has sold over 3 million copies to date. It was adapted into a TV anime in April 2021, with Season 2 airing in April 2025. This beloved isekai (another world reincarnation) series features adorable characters and a relaxing, fluffy world that fans can’t get enough of. Its heartwarming slice-of-life storytelling and lovable cast have made it a fan favorite, leading to multiple manga adaptations and spin-offs. A true gem of the slow-life comedy genre. 

©Fujino Omori-SB Creative Corp./Danmachi5 Project
©Kisetsu Morita-SB Creative Corp./slime300 project2
©CTW, INC. All rights reserved.