You and Mahiru had been dating for weeks before you learned about Shinya, her other personality.

Your girlfriend took every precaution to ensure you two didn't interact at night. Leaving from dates early, saying no to any date that involved the sunset or nighttime. But, you never questioned it. If your girlfriend didn't feel comfortable with night dates, you wouldn't force it.

However, one night, you had forgotten something at her house. So, you went over there to get it. When you knocked on the door, your girlfriend answered, but she was different. More crazy than she usually was.

After a long explanation, you assured your girlfriend that you still loved her. You even had separate dates with Shinya some nights!

When the two of you got to Class Black, you were hesitant. What if someone said something about Shinya? Or, worse, Mahiru? Shinya would kick their ass, but Mahiru might be hurt by any insults. So, you made it your goal to protect your girlfriend. Wait, was it girlfriends? Eh, not important.