"Elder Kettle, can we play outside?" Cuphead asked.

"Of course." Elder Kettle replied. "But before you go out there-"

"We know, don't go to the casino. We've already gambled our lives to Satan once, and we won't do it again." Cuphead interrupted.

"That wasn't what I was going to say, but-" Elder Kettle said, before Cuphead interrupted him again.

"Oh, so we can gamble our lives to Satan again?" Cuphead said.

"Good lord, no! Elder Kettle said. "Now, let me finish. There is this legend being told about a portal all around Inkwell Isle. I heard the legend, and the legend says that the portal takes you to another universe, but once you go there, you will never be able to come back. Although it has never really been proven what is in that universe, or if the legend is true, if you see a portal, for the love of god, do not, I tell you, do not go into the portal. Who knows what is behind that portal? Who knows what will happen to you? Please do not go into any portals, you hear me, boys?"

"Yes, Elder Kettle." Cuphead and Mugman both said.

"Can we play now?" Cuphead asked.

"Yes." Elder Kettle told the cup brothers.

So Cuphead and Mugman grabbed their butterfly nets to catch some butterflies. Cuphead caught fifteen of them, while Mugman, not even one. All because of this beautiful, purple, blue, and green butterfly on an orange flower.

"Mugman?" Cuphead said, trying to get Mugman's attention off of the butterfly.

"Mugman, you haven't even caught one butterfly yet. Is that butterfly really that breath-taking?" Cuphead asked.

The butterfly started to flutter around, and then flew off of the orange flower. Mugman followed the butterfly, with his butterfly net. The butterfly kept fluttering away. Then Cuphead followed the butterfly along with Mugman. But Cuphead was running to try and catch it.

After a few long minutes of trying to catch the butterfly, Cuphead and Mugman stopped to catch their breath. When they caught their breath, Mugman walked towards the butterfly. It was right next to the portal.

Cuphead remembered what Elder Kettle told him and Mugman.

"The legend says that the portal takes you to another universe, but once you go there, you will never be able to come back."

"Mugman, no!" Cuphead yelled. "Do you remember what Elder Kettle told us?"

Then the butterfly flew into the portal.

Cuphead sighed. "Mugman, please don't go into that portal. Elder Kettle said that once you go into the universe that the portal leads to, you can't come back. I don't want you to leave. I might never see you again. Ever. And it'll be all because of a butterfly."

Then Mugman tripped into the portal.

"Mugman, NO!"