Mane Mane Nichi Nichi

• Name — Mane Mane Nichi Nichi: Baseball Manager Everyday • Ja Kanji — マネマネにちにち • Ja Romaji — Mane Mane Nichi Nichi • Genre — * Comedy • Slice of life • Sports

• Author — Sōichirō Yamamoto • Publisher — Shogakukan • Magazine — Monthly Shōnen Sunday • Imprint — Shōnen Sunday Comics Special • First — July 12, 2024 • Volumes — 4 Mane Mane Nichi Nichi: Baseball Manager Everyday is a Japanese manga series written and illustrated by Sōichirō Yamamoto. It began serialization in Shogakukan's manga magazine Monthly Shōnen Sunday in July 2024, and has been compiled into four tankōbon volumes as of September 2026.

The series follows three high school students, Akane Nagisa, Karina Ichinose and Yuki Himemiya, who serve as managers of their school's baseball club. Each of them became managers for different reasons, but despite their different backgrounds and interest in baseball, the three become friends.

• Akane Nagisa • Rie Takahashi (PV) • A high school student and one of the three managers. She decided to become a manager despite knowing nothing about baseball as she wanted to become more popular. • Karina Ichinose • Kanna Nakamura (PV) • A high school student and a gyaru. In contrast to Nagisa, she is knowledgeable about baseball, much to the others' surprise. • Yuki Himemiya • Yūko Natsuyoshi (PV) • A high school student. She initially became a manager because her boyfriend was a player on the team at the time, although they since broke up. She is currently dating Shimohara, one of the other players. • Taichi Karasuma • A high school student who is a first-year member of the baseball club. He is a childhood friend of Nagisa who is a huge fan of baseball. • Shibata • A high school student who is a first-year member of the baseball club. He seemingly has a crush on Ichinose. • Shimohara • A high school student who is a first-year member of the baseball club. He is Himemiya's current boyfriend. • Yagami-senpai • A high school student who is a second-year member of the baseball club. He tends to be scary whenever he is angry. • Hayashi • A high school student who is a first-year member of the baseball club. He often witnesses the various things the managers do. • Tanabe-sensei • The advisor of the baseball club who is not particularly knowledgeable about the sport.

Written and illustrated by Sōichirō Yamamoto, Mane Mane Nichi Nichi: Baseball Manager Everyday began serialization in Shogakukan's Monthly Shōnen Sunday on July 12, 2024. The first tankōbon volume was released on March 12, 2025. To promote the volume's release, Shogakukan released a promotional video featuring the voice actresses who played the heroines of Yamamoto's previous works. The first volume gained attention online for costing more compared to other series from the same magazine. Four volumes have been released as of September 11, 2026. During their panel at San Diego Comic-Con 2026, Yen Press announced that they had licensed the series for English publication.

Mane Mane Nichi Nichi is associated with Japan.