MonMusuOnline

Monster Musume no Iru Nichijou ONLINE

Website: http://www.dmm.com/netgame/social/-/gadgets/=/app_id=365723/
Official Twitter: https://twitter.com/monmusu_online

F2P browser based game by DMM (same guys that did Kantai Collection and Touken Ranbu) based on that one manga that most people stopped reading years ago because it's mostly generic haremshit. The player is a prospective host for the species exchange program. You host the girls, take them out for walks to showdown with other groups of girls and occasionally engage in full contact headpatting action.

How to register:
Guide: http://kancolle.wikia.com/wiki/Tutorial:_How_to_Register
Rather than writing out a half page guide on how this works, I'm just going to steal the Kantai Collection guide because that has all you need. But when it tells you to go to the games site, use the above link instead. This game does not use a lottery system like Kantai Collection, registration is open to anyone (who can jump through the hoops). Personally I use the Chrome extension and just tell it to auto fix the cookies every time, but any way that works for you is good.

This game uses a paid currency known as Rubies that are roughly ¥100 (~$1USD) for 1, but get cheaper the larger number you buy. However, you don't need to buy any to play the game as it will give you a reasonable amount through one time rewards and some daily login bonuses. Buying rubies can help to speed up your progress through the game, though.

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Current Event:
Lost Yeti Child Great Search! 2015/12/28 - 2016/01/06
Complete the event maps and related requests to obtain Miti the Yeti, HR Pure.

Previous Events:
Release event 2015/12/21 - 2015/12/28
Increased SR rates in the Premium Gacha

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Translated Twitter Profiles:
https://imgur.com/a/UGaRJ

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If anyone was interested for legacy reasons/wanted to know what they missed out on, the pre-register bonus was only 5 rubies, and not an exclusive character like some games do (some people keep saying Miia was pre-register only, but they're idiots).