Malty Melromarc (Pixiv Fanbox)

"A dangerous game is what Malty found herself partaking in. She thought it was such an easy task. Read the code, input it into the lock and free yourself from the tank. Completing this task would reward her with luxurious and valuable prizes. Little did Malty know that she would overlook such a normal aspect of being underwater. Now, this spike in difficulty may prove to be more than what the arrogant woman can handle."