Shin Moshi Onna no Ko ni Nattara Nani kara Yaru ka ~Danshikou Saigo no 5-kakan~

After he played a game he purchased in a shop, a change happened to his body...
The last 5 days that Yona, who became a girl, spends in the school for boys.
Yona gradually learns to use the weapon of the female and deal with men.
This is a heartwarming story of a sex-reversed boy in school.

[From DLsite English]