Volume 1 (Harem Royale)

Ren'ai Harem Game Shuuryou no Oshirase ga kuru Koro ni (恋愛ハーレムゲーム終了のお知らせがくる頃に) Volume 1 is the first volume of When the Game Ends.

Summary
Kohinata Asunaro picks up a mysterious object that falls from the sky and takes it home. In doing so, he accidentally releases the demon Zepafur from captivity. As repayment for releasing her, Zepafur uses her powers to make Asunaro's fantasies come true in the form of the "Lovey-Dovey Harem Royale". Furthermore, Zepafur isolates Asunaro from his parents by sending them to a country called the Purupurupicopyo Republic on a business trip. Zepafur appears before one of Asunaro's crushes, a classmate named Serika Furuwada. Serika is initially resilient but is forced into the Harem Royale game when Zepafur repeatedly tortures her. While carrying out her first "daily mission" for Asunaro, Serika learns of the other three participants: Tatewaki Saya, Heather Shinonome, and Yumezuka Liru. Serika organizes a meeting between the four and proposes a boycott of the second mission. This boycott leads to each of the four losing the second round of the game and reveals the existence of a fifth participant. The four girls work together and eventually determine the identity of the fifth participant: Ren Suigyoku.

Chapters

 * 00. The Heart Pouding Love or Death Game Begins! (ドキドキハーレムでパニクる頃に!)
 * 01. The Crimson Devil and the Beginning of the Game (真紅の悪魔とはじまりのゲーム)
 * 02. Love Subject (恋愛対象者)
 * 03. Formation! Bodyguard Asunaro (結成！アスナロ親衛隊)
 * 04. 5 Person Romance Subject (５人目の恋愛対象者)