I know of 3. Siren (this one) being a mobage + continuation manga, Bhikkhuni being beat-em-up game + manga, And Mermaid being the anime.
All of them sharing the same premise of girls being incarcerated on an island for being infected by a virus that turns them into weapons (and does other things) when they get excited. They also share the yuri-ish ecchi tone and general character design guidelines.
Though, those I know something about, Siren and Mermaid have non-yuri distractions often enough to bother me. Siren's player character being explicitly male (though if manga is anything to go by, he doesn't get romantically involved with main girls) invokes old "only guy in a strictly female environment" trope I dislike. Mermaid had Mamori's crush on Governer (I know), tentacle + faceless sand guys "fanservice", and the whole ending debacle with non-relationship main girls ended up in.
It's a hentai that doesn't want to admit it's one, or that's been watered down in order to barely pass censorship.
It's just intended as fap material for male teens.
Neither of those make it not good. Lack of plot development and character development is what damns it. It being a supplementary manga to the game holds it back - can't resolve anything or change anything.
last edited at Aug 9, 2018 8:34AM