" Practical and stoic! It's the Solid Heart Class! Students in this class can state their opinions while keeping their cool and being objective. For some reason, they seem to be worried about the Pure Heart Class, though... "
― Class introduction[src]
Solid Heart Class is a unit created exclusively for the 2023 April Fools Day event.
Members[]
 Hinomori Shiho |
 Momoi Airi |
 Shinonome Akito |
 Kusanagi Nene |
 Shinonome Ena |
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 KAITO |
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