The episode begins with Junpei finding what he thinks is a pink love letter in his shoe locker. To his disappointment, it is actually a formal challenge to a duel from Nagi Ichinose , the athletic and intimidating captain of the track team.
While at the estate, Junpei is cornered by Josephine , the Ichinose family’s pet cat. Josephine asks Junpei to help her master, Nagi, find true love and embrace her feminine side. Key Character Debut Nyan Koi! Episode 4
A "reverse trap" character who is the heir to a Yakuza family. Though she starts as an antagonist, she eventually develops her own feelings for Junpei after he sees her true self. The episode begins with Junpei finding what he
Upon arriving at Nagi’s home—which happens to be a Yakuza estate —the group discovers two major secrets: Josephine asks Junpei to help her master, Nagi,
The episode ends with Nagi’s secret exposed to the main group, shifting the dynamic from a hostile rivalry to a complicated addition to Junpei’s growing harem.
Nagi believes Junpei is unworthy of Kaede Mizuno and intends to "claim" Kaede for herself. After Nagi faints from overexertion during her confrontation with Junpei, he, Kaede, and Kanako help her home.