So this appeared on Nutaku's homepage today.
Armor Blitz is actually a game that started developement about a year and half ago, and it didn't have any H content. It was in beta for the majority of 2016, then it was relased in september. You can find the android version in the play store

apps/details?id=com.Gaudium.ArmorBlitz.SEA

I woud describe the main gameplay as something like "Clash of Kings without the CCG elements" perhaps. You and the opponent's leader tank girls start at opposite ends on a screen. You both deploy the other tank girls in your team, who will rush foward and shoot each other. The CPU enemy has towers and more reservers; you have skills such as aimed mortar strikes or buffs for your tank girls. Whoeverer destroys the opponent first wins.

The campaing is on a hex map, each hex a battle. Progressing with the story, you capture some hexes with production facilities that refills your metal, oil and credits, and core stocks. You use oil to battle, metal to repair your tank girls, credits to level facilities and girls, and cores+metal+credits to gacha for new tank girls. The gacha needs hours of time to complete.

The Gift system and H-content is not in the android version (at least not when I last played) so I don't know how will it work.