#Cover illustration: Nikumaru 1. Mesugakishiki Mental Management (メスガキ式メンタルマネジメント) \[Takahashi Potato (高橋ぽてと)\] 2. Aori, Aorare (あおり、あおられ) \[Shioyaki Ayu (汐焼あゆ)\] 3. Gakincho Boot Camp (がきんちょブートキャンプ) \[Kuma Pantsu (くまパンツ)\] 4. Saki-chan wa Kamatte Hoshii (咲ちゃんはかまってほしい) \[Neko Mattan (ねこ末端)\] 5. Chiyu Shite Hoshii (ちゆして欲しい) \[Susan (吸斬)\] 6. Shikigami Youko no Omoi Koto (式神妖狐の想い事) \[Jinja Ale (神社えーる)\] 7. Yamikei Mesugaki Haishinsha wa Oniisan wo Sokubaku Shitai (病み系メスガキ配信者はお兄さんを束縛したい) \[Ookido Karo (大成戸カロ)\] 8. Failed ♥ Quest (FAILED ♥ QUEST) \[Kanmuri (かんむり)\] 9. Yogaru Cupid (ヨガるキューピット) \[Yawaraka Black (やわらかブラック)\] 10. Uchuu wa Mesugaki de Mawatteiru (宇宙はメスガキで回っている) \[Sasamashin (ササマシン)\] 11. Pudding Nante Iranai Mon! (プリンなんていらないもん!) \[Gouda Nagi (剛田ナギ)\]

What if Miyamoto Musashi was actually a ninja, and he defeated Sasaki Kojiro using the power of ninjutsu...

In 1962, Isao Shibata debuted as a pitcher for the Giants, but his talent was overlooked and he was told to switch to the field. A young girl named Kiriko appeared in front of the discouraged Shibata and presented him with a secret book of Kouga Ninjutsu that she found by chance in her hometown. With her encouragement, Shibata vowed to make a fresh start as a fielder, and learned the secrets of the ninja arts written in the book one by one.

The year is 1961. Sadaharu Oh of the Yomiuri Giants, in a critical situation due to an injury during a game, had a sudden flash of insight that enabled him to read the thoughts of the opposing pitcher. He remembered he had a similar experience in junior high school. He tried various methods, but the ability of the future sight worked only once in five. After much anguish, he consulted with Coach Arakawa, who taught him to trigger his ability by putting himself in an unstable state with the one-legged hitting method. From then on, Ou mass-produced home runs using the one-legged batting technique to become the undisputed No. 3 hitter of the Giants and win multiple home run crowns.