Idle Angels

You can roll for random character credits, for a chance at receiving enough to unlock one. Alternatively you can roll for a certain character from a select few, but your rewards will be padded with upgrade materials instead of random characters.

The winners of PVP events are always advertised. Those who successfully achieve progress like summoning an angel or maximizing their angel potential will show a banner for the server.

PVP is secondary, but glorified with multiple arenas that allow competition between servers, players on the same server, as well as the entire platform. You'll generally compete against players near your level, but there will always be a better group if you are not spending enough money.

You'll lose valuable progress, and you can catch up if you pay or watch ads. The less present you are, the less competitive your account becomes, and the slower your progression is.

It's marketed to be an erotic game, but doesn't really go beyond costumes (which cost real money) and limited dialog from the story.

Everything is a deal, according to the store.

You can expand your equipment storage capacity.

Competitive rewards are based on your performance, but the battles are always automated. You are technically in control of your lineup order, but nothing else. PvE rewards are random, but predictable depending on what part of your daily operations you're completing. Event rewards tend to be consistent, but based on how far in the event you are able to progress. Most of the PvE events are actually easy.

You gradually unlock new systems to progress further. You're actually punished if you try to spend too early, like before account level 80.

You cannot complete certain stages without enough power. The further stages you complete, the more competitive your account becomes.