Blooming Hour is a 4-star Memoria for Zayne, released May 10, 2026 as the free reward for the May iteration of the recurring '10 Days With You' check-in event. Players who logged in on any 10 of the 18-day event window (May 10–28) received the card free. The memory carries an ATK Buff function and is categorised as a Violet Stellactrum / Lunar Position card. Detailed story content is not summarised on the community wikis at the time of this report. The card was subsequently added to the permanent Galaxy Explorer acquisition pool on June 7, 2026 alongside the Caleb birthday update.