The Disastrous Life of Saiki K.

An Ugly Bolt Out of the Blue + Conceal Your Hidden Power! + A Fight Between the Two Worst People + A Miraculously Average Guy Appears! + Disaster in the Library Room (2x11)

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Nendo gets a love letter from a freshman coed and Saiki figures it's a prank, but he soon realizes she's serious. Nendo, being Nendo, wants to say no.