Weiss Schwarz Premium Boosters - ONIMAI: I’m Now Your Sister!

Available starting January 22

Weiss Schwarz – Premium Booster

Mahiro Oyama, a “NEET” (someone who is neither employed, in school, nor in training) who lives as a recluse at home, wakes up one day transformed into… a young girl!?

Baffled by the beautiful stranger staring back at him in the mirror, Mahiro is called out by his little sister, Mihari Oyama—a genius scientist who entered college at a very young age. It turns out that a suspicious substance was slipped into his drink...!

The manga series has sold over 1.5 million copies. It ranked 3rd in the “Mangas We Want to See Adapted into Anime” poll (2020), 9th in the “Web Manga General Election” (2019), and 5th in the “Next Big Manga Awards” (2018).

NIICHAN HA OSHIMAII

Highlights

Have fun creating card combinations inspired by Mihari’s “Big Brother Transformation Plan”!

Original Illustrations

Six illustrations created by the animation studio, accompanied by six illustrations created by the original author.

Signed Cards

Original Author

Nekotoufu (Sensei)

Cast (Voice Actors)

Mahiro Oyama: Marika Kōno
Mihari Oyama: Kaori Ishihara
Kaede Hozuki: Hisako Kanemoto
Momiji Hozuki: Minami Tsuda
Asahi Ōka: Kana Yūki
Miyo Murosaki: Natsumi Hioka

“Neo-Standard” Category

You may only build a deck using cards whose number begins with “ONO/”.

Number of Cards

Standard: 65 cards
+
Parallel: 65 cards or more

4 cards per booster pack
6 booster packs per display
30 displays per carton