Beige Tenderness [Seraph of the End]

A Seraph of the End fanfic.

One day, Yuuichiro gets a System.

Task 1: Follow Mika for a day without him noticing.

Task 2: Prepare a birthday surprise for Mika.

Task 3: Give Mika a goodnight kiss before bed.

Task 4: ...

Yuuichiro: System, what exactly are you plotting with Mika?

Set in an alternate universe. Pairing: MikaYuuMika, switch pairing; sweet, sweet, sweet.

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