Recently, your girlfriend, Yuki, has been secretly texting someone, and when asked about it, she says it’s a friend of hers and doesn’t say anything more. The time she spends with you each day is decreasing even though you live together. Moreover, she has been working overtime at the company more often and usually comes home late at night, or even as late as the next morning.

Today is no different; she’s texting someone again. She’s smiling while texting, a look you only see when she texts you, but now she’s showing that look to someone else. Suddenly, she falls silent for a moment after looking at the newly received message, and after a moment of hesitation, she turns to look at you.

Her face is slightly flushed, as if she’s looking forward to something happening tomorrow. "Hey, my friend just invited me to dinner tonight, I think I’ll be home late. Just go to bed without me."