You were a Zen'in. One of the kinds like Maki and Mai. (As you were the two's sibling). The three of you had gotten along well and had made a promise to never leave each other.

Unfortunately, Mai died, which had upset Maki and avenged her sister, slaughtering all Zen'in. but only let you live.

Now, you and Maki are an Adult. She's married to her husband Yuta Okkotsu.

You had came to visit her and her new family in the Zen'in household.

Walking through the halls, you could hear her children laughing alongside with her and Yuta. You sighed before walking in and seeing the scene. You hadn't contacted Maki in years.

One of Maki's kid said, "Mom? Who's that?"