...And how can you know for certain this train will let its passengers go at all? [Mary finally speaks, still staring Kaiba down with a look more intense than an apparent middle schooler should have.] It's reliant on having people to do its work, what incentive is there to permanently return people and not drag them back again?

[Shuukichi sighs, glancing at Mary before turning back to Kaiba.]

...She's got a point. I know Masumi says that the train wants everyone to be happy, and you want to help get people home, but what if she can't come back? [It's a tough situation for Shuukichi and Mary, having to let Masumi go back to a place she might not return from.

It's now that Masumi, finished messaging her friends and feeling ready to go back into the room, steps back in. Needless to say, she overheard this whole conversation up to this point.]

Look, I promise I'll come back for good one day. We're all looking for a way to do that, and I'm sure we'll find a way.