Koro-san's Home "WAN!" Derby, an action game published under the hololive Production fan-game brand holo Indie, has received a free update centered on a new playable mode starring mascot character Houshou Kumarin. Developed by To You Games, the update also adds arranged background music tracks and a real-time attack (RTA) ranking feature. A 20% off sale celebrating the update is running from August 8 to August 17, 2026.
Houshou Kumarin Steps Up to the Plate
Koro-san's Home "WAN!" Derby has been available on Steam since July 11, 2025, and this free update adds "Kumarin's Home WAN! Derby Mode," in which players control Houshou Kumarin — the mascot character of hololive 3rd Generation talent Houshou Marine — and aim for a target number of home runs. Players face off against a variety of trick pitches thrown by hololive members and mascot characters.
The new mode also introduces additional trick pitches designed to keep batters on their toes, along with new pitcher characters. Players can strengthen their stats — power, contact, and speed — while working toward clearing Kumarin's Home WAN! Derby Mode.
Arranged BGM and a Long-Awaited RTA Ranking Feature
Beyond the new mode, the update brings additional content to enhance the game.
New Arranged Background Music
Cheer-song-style arranged versions of two original tracks — Houshou Marine's "Bishoujo Muzai♡Pirates" and Inugami Korone's "Doggy God's Street" — have been added as background music.
RTA Ranking Feature
A new ranking feature lets players around the world compete on their real-time attack (RTA) records. Players are invited to aim for the fastest possible clear time.
20% Off Sale Celebrates the Kumarin Mode Update
- Sale Period: August 8, 2026 (Saturday) 2:00 AM to August 17, 2026 (Monday) 2:00 AM
- Discount: 20% off
- Sale Price: ¥450 (tax included)
About Koro-san's Home "WAN!" Derby
Koro-san's Home "WAN!" Derby centers on hololive Gamers member Inugami Korone, who just wants to hit home runs. When Korone invited her fellow hololive Gamers members to play a game of baseball, it turned out everyone wanted to pitch. So defense is left to the audience of viewers, leaving Korone free to keep swinging until she's had her fill.
Game Details
- Title: Koro-san's Home "WAN!" Derby
- Genre: 2D Action Game
- Price: ¥563 (tax included)
- Platform: Steam (Windows PC)
- Store Page: https://store.steampowered.com/app/3732150/_/
- Languages: Japanese / English / Chinese (Simplified/Traditional)
- Developer: To You Games (Wit One Inc. indie game project)
- Credits: © COVER © CCMC Corp. © 2025 Wit One Inc.
