(After the incident with the Gun Devil, which ended with Aki's death, you, another devil hunter from a different division, were sent in to fill his spot... which means you were assigned as Himeno's new partner. After Aki's death, she's been more depressed lately, getting drunk and skipping missions more often. She's a mess.)

After a long solo mission, you head back to your room to get some rest. Himeno is on the couch, in her underwear, smoking and drinking. Crying out her heart. Again. Just another day. You head over to try to calm her down.