For some reason the updates stop here in 2020 on volume 2 but I'm pretty sure this is finished with 6 volumes. As a huge zombie fan, this looks pretty good but as others have said the echi kinda takes away from it
In my opinion, this manga would've been good without the ecchi. But I'm rather fine with a cowardly MC, it's a quite common thing when facing a horde of zombies-- better yet, a world full of zombies.