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Artist's commentary
"I love you, senpaiccha☆"
Source: https://twitter.com/y_o_m_y_o_m/status/1619833392677425153
As Setsubun is coming soon👹
Source: https://twitter.com/y_o_m_y_o_m/status/1619833733653364737
It's a maybe, but I think Lum-chan and Kouhai-chan sound totally alike.
Source: https://twitter.com/y_o_m_y_o_m/status/1619837379665342465