Talk:Special Investigation: Bunkyuu Tosahan/@comment-175.176.18.36-20190425131450/@comment-108.67.107.106-20190425233012

I'm going to guess the TKRB franchise makes more money from its many other ventures (stage shows, anime, movies, merchandise, etc.) than other mobile games, so that's why they're generally able to make events and rewards so cheap/free to obtain.

Anyway, this is different so I don't know how to approach the math, but I think I figured last time you could get Chougi using free dice even if you only ever rolled ones on your refill dice. I think my math there also included the free Lucky Seven dice you got as rewards. In this case, you four free dice a day for three weeks, plus some free Lucky Seven dice if you clear once, so clearing twice is probably a given if you don't miss your free refills.