http://chaincrers.webcrow.jp/campaign.html

Click on the right most link for each freebie (where it says こちら). On that window, the last link at the bottom is the claim option.

Click on link -> Game gets opened -> Go to your giftbox -> Get out -> Claim next freebie

For some reason, if you don't go to your gifbox (or refresh) your next freebie can't be claimed.

If you're using an emulator and the link takes you to the appstore, download Dolphin Browser and use that instead.

Highly useful for re-rollers. And if you're doing that, waste all those pulls trying to get Reve (http://chronicle.sega-net.com/chronicle/upload_images/レーヴェ.jpg)

He can reach over 100% ATK boost, has crit dmg and 25% dmg reduction. Dude normal attacks hit for over 10k at mlb. He's forever useful.

I think there are enough freebies for 7 more pulls?

Oh, and there are 2 free SRs too. One is a healer, the other an useful warrior for low cost missions.