Assault Lily: Last Bullet - Secret Garden ~ Dreamy Memoria ~ - Ch. 1

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Fun facts:

• Kaede was forced to take Yuri in as her roommate because she was the only member of Team Hitotsuyanagi without one already. She wasn't happy about this at first, but after a while she warmed up to Yuri.
• The reason why Kaede is the only member of Team Hitotsuyanagi without a roommate is because her father bribed the school to allow it (and also got her a much larger room.)

These were revealed in the recap event of Bouquet episodes 7-9 that happened in Assault Lily: Last Bullet.