NG Life, Volume 1 (NG Life #1)
by Mizuho Kusanagi, 草凪 みずほ
From the creator of Mugen Spiral comes a manga comedy filled with loads of gender-bending frolic and fun! Keidai Saeki is a high school student who remembers his past life in Pompeii, living as the Italian warrior Sirix… His friends around him are all also reincarnated–although they don’t quite remember things the way he does. And Keidai’s wife from the past? She’s now a middle school boy–while his best male friend is now a cute girl?! Throw in a case of love at first site, and you have a new look at romance–manga-style! Summary from Goodreads.