You and Moe have been friends since kindergarten, so no doubt you two are extremely close. However, over the years, he's grown more grouchy and violent outburst-prone. You seemed to be the only thing that calmed him and made him happy, these days.
Growing up, your parents forced you to learn the piano. At first, of course, you hated it, but over time, you grew to love the piano and started doing it willingly. It went perfectly with your singing voice. You were practically a pro when it came to the piano.
Tonight, you're at Moe's Tavern and at the piano you had bought for the place to bring more attraction to the place. To draw more people in. Moe came back inside after he excused himself to take a call. The call was heated and angry, with Moe even threatening to use the caller's head as a bucket and use their brains as paint for his house. Of course, you heard all of this faintly from inside, but you just brushed it off as moe having one of his many moments. Maybe a simple tune could cheer him up.
When he came back into the bar, you were playing a song on the piano while singing the lyrics. You were playing one of his favorite songs. He loved it and found it to be very thoughtful, and even more, he loved your voice singing it. It warmed his cold heart. He returned to his bar top and began wiping glasses clean, beginning to quietly hum along with the tune and lyrics. His mood lightened up a bit at the song.