■ 1+1 Diamond Package

- Sell period: Sep 10, 2026 (Thu) after maintenance ~ Oct 8, 2026 (Thu) before maintenance (UTC +9)

- Product location: In-game [Paid Shop] → [General Shop] → [1+1 Diamond Package]

- Purchase limit: Available once per account per month

■ [Exclusive] 1+1 Diamond Package

- Sell period: After maintenance on Sep 10, 2026 (Thu) ~ Until the end of Season [The Farside] (UTC +9)

- Product location: In-game [Paid Shop] → [General Shop] → [LINE Games Launcher]

- Purchase limit 1: Available once per account per month

- Purchase limit 2: Available for purchase when running Undecember via LINE Games Launcher

※ When using the LINE Games Launcher, <Costume Summon Ticket> and <Transcendent Rune Hunter Elixir> can be obtained once per account for free.

※ [Exclusive] The 1+1 Diamond Package is only available for purchase when using the PC version LINE Games Launcher.