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Underdog and Lion

負け犬とライオン

“After another man steals his girlfriend, heartbroken student Riku transforms under charismatic mentor Yuji, aiming to become a legendary playboy.”

Manga

Erotica, Harem, Seinen2026 - Present

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Underdog and Lion

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Synopsis

After another man steals his girlfriend, heartbroken student Riku transforms under charismatic mentor Yuji, aiming to become a legendary playboy.

Riku, a university student left devastated after his long-term girlfriend is cruelly stolen by another man, undergoes a total transformation under the guidance of a charismatic middle-aged man named Yuji! From a "loser dog" to the king of beasts, Riku aims to become the ultimate lion! Witness the birth of a legendary playboy in the Reiwa era!

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A self-contained story.

No sequels, spin-offs or alternate tellings — Underdog and Lion begins and ends here.

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Publication slate

Reel · 01 Cat. №BS-M88297

A Manga Publication

Published
Jan 2026 – ongoing
Source
Manga
media type
Ref.
BS-M88297
catalog

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