Honestly, when i first read the summary of this manga, all i could think was "I could not get it"
"Who's who?"... "Who turned into this?"... "She became he?"... "He became she?"... Hold up!! I am not getting this for real...
So I ignored this manga for quite some time...
Yet, after learning that the writer of this manga was the same creator of the historical masterpiece, Akatsuki no Yona, Mizuho Kusanagi... I gave it a go.
And I swore myself after realising how did I manage ignore this amusing manga...
The humour was everywhere and the male lead traits are way too funny. It is more of a story of regrets and acceptance... Keidan (Sirix, in his past life) regretted the fact that he left his wife Serena alone during the extinction of Pompeii and Serena returned back as a guy, Yuuma. His bestfriend, who died before him, Loleus, returned as well as a girl, Mii. Yet the 2 latter characters did not know that they existed in the past unlike Keidan who rememberd it all. Thus, carrying the guilt and longing by himself since they could not understand how he felt. Just see how complicated the story was and how Kusanagi-sensei put humor into it.