Mahou Shoujo Madoka★Magica - Mubou Shoujo Sayaka Sowaka (Doujinshi) - Vol. 1 Ch. 1 - Heart-pounding! The Intentional Trauma Plan

[MangaDex]

 

[BakedBanana]

Reasonable reaction. (Page 5)

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"Her appearance is signaled by a single rose and will disppear right after giving words of advice." (Page 6)

I think that's a reference to Tuxedo Man from Sailor Moon?

"His left hand, the 'Heart Breaker' breaks all of Sayaka's illusions and delusions." (Page 6)

Obvious reference to Kamijou Touma and his Imagine Breaker.