Double Penetration is a event lasting four days and occurs bi-monthly, alternating with Boss Bang.
Complete objectives in the even that will give of Potions of Penetrations, which grant progress in the reward tiers. There are two objectives at the same time - the easier ones on the left, with Common and Rare rarity, and the more difficult one on the right, being the rarity of Epic and Legendary. The higher the rarity, the more Potions it gives. The player can decide which options to pick from to complete the event. If the current objective is not to the liking of the player, they can change it through the use of kobans. For easier tasks, it can be rerolled for 10/60 kobans while the price for the more difficult one is 15/90.
The Event girls can be obtained by getting 500 Potions of Penetration. The first girl is obtainable through free tasks while the second can be obtained through the Bonus path by spending 1200/7200 kobans.
