It was a hot summer afternoon in the Oregon town of Gravity Falls, where weird and mysterious are a daily occurrence for those with the eyes to see it. One of the people with those eyes is the young Dipper Pines, who was currently doing a field study with the help of the mysterious journal that he had found at the beginning of summer.

"It should be around here somewhere." He said as he looked around till he found what he had been searching for for most of the afternoon.

'A-ha! There you are!' He thought to himself as to not scare away what he had found. There, crawling along a low-hanging branch of an oak tree, Dipper found what appeared to be a ladybug. However, what made this ladybug different to other members of its species was that rather than little black spots on its red back, its back was black and there what looked to be little red hearts instead of black spots.

'Took me the better part of an afternoon, but I finally found you.' He thought as he grabbed a small jar from his backpack and slowly creeped up to the small insect. However, just as he was about to capture it…

"Hey, Bro-Bro! Whatcha doin'!" Came the voice of his hyperactive sister Mabel.

"Woah Jesus!" Dipper yelled scaring the the ladybug away. "Oh man, thanks a lot Mabel you let the bug get away." Dipper complained

"Sorry but you need to come home, Grunkle Stan needs our help with something." Mabel said.

"Fine, better than staying out in this heat." Dipper said as he got up and went with Mabel. Little did he know, the bug he had just seen fly away had landed on his hat and was now crawling down the back of it.

As the twins made it back to the shack, Dipper was met with a surprising shock: Pacifica Northwest was here.

"What is she doing here?" Dipper asked.

"I had to get a job and this is the only place that would hire me." She explained.

"Wow, how the mighty have fallen." Mabel joked as she poked her cheek.

"The irony is delic-YOW!" Dipper exclaimed as he slapped the back of his neck.

"What's up, Dipping Sauce?" Mabel asked.

"Something bit me," Dipper said, rubbing the spot where he felt a bite mark.

"Ha-ha." Mabel laughed.

"It's not funny. It's really starting to itch." Dipper said, scratching at the bug bite.

"Fine, I'll rub that lotion we use for your ra-." Dipper then covered her mouth.

"We don't talk about that." Dipper said through gritted teeth as he pushed her upstairs to their attic/bedroom.

"Alright Dip, take off your shirt." Mabel said, applying the lotion to her hands and rubbing them together.

"Don't you think that's a little too much?" Dipper asked

"Dipper, do you want me to do this or not? I could get Wendy or Pacifica to do it." She teased.

"Fine!" Dipper said as he took off his shirt, revealing his pasty skin but for some reason, Mabel couldn't look away. Sure, she's seen her brother like this before, but this time it was different. She was actually attracted to him. She just shaked it away and focused on where her brother felt the bite. She then found a heart-shaped bite mark near the nape of Dipper's neck. She then took the ointment and started rubbing on her brother's bite slowly she soon started to moved her hands down his back.

"Uh Mabel, you seem to be moving a little low there." He said

"Oh sorry." Mabel said. "I just wanted to see if you wanted a massage to help you relax?" She said nervously, which Dipper gave her a questioning look. "It's just that you been out all day, you must be sore." She explained with a nervous smile.

"Fine." Dipper said as he laid back down. Mabel then left the room to retrieve lotion as she returned she locked the door she then took off her sweater and straddled him. She then poured some of the lotion on her hands and started rubbing his back. Her soft hands rubbed his back, making Mabel more anxious she then takes off her bra and pours the lotion on her chest and lays down on his back and started rubbing up against his back.

"Uh Mabel?" Dipper asked

"Shh. No talking just let this happen." She said as she continued rubbing up against him. Mabel soon stops as she heard a knock on the door, causing the twins to look at it.

"Hey guys, your grunkle or whatever says to get back downstairs and work." they heard Pacifica yell. Dipper then looks at his topless sister, her budding chest on full display. Mabel then covered herself and got off Dipper.

"So, um, we won't talk about this." Dipper said

"Yeah." was all Mabel could say as she got dressed. "But if you want to do something like that... just ask." Mabel said.

"Sure." Dipper replied. As the two left the room, Mabel grabbed Dipper's arm. She then kissed his cheek and ran downstairs. Dipper then felt his cheek.

"That was… different." He said. Suddenly, his bug bite started to throb.