"Hey! We haven't finished our TOTALLY AWESOME training yet!"

Sans looked up as Undyne hurtled after Frisk, knocking the door aside and storming into the house in pursuit of the tiny human.

"Woah there buddy, having some special bonding time with our fishy friend I see." Sans winked at the panicked child, hurriedly using his magic to help the human into the cabinet. He barely had time to release his magic when Undyne exploded into the kitchen where he was drinking his ketchup, and roared in frustration.

"Where's the punk?! They haven't even finished their laps! GET OUT HERE YOU SLACKER!" Undyne punched the table, managing to break it straight in half. Sans had managed to save his ketchup bottle before eyeing the table nervously. Toriel would be not be happy about the table, it was the fifth that had been smashed that week.

Undyne gave one last furious glare at the furniture before leaving, making an exit just as violent as her entrance. Sans cracked a grin. "Hey kid, you can come out now, we still got a skeleton to talk about." His teeth may not have moved, but his eye sockets were empty, showing no emotion.

He watched as Frisk slowly lowered themselves from the cabinet to stand nervously next to him. They were acting very nervous, refusing to look up at him. Sans grunted, and looked around, searching for any monsters who could be eavesdropping. He nodded, satisfied with his search, and decided to lessen the tension a bit.

"Hey, don't look so chilled to the bone, why don't we go to Grillby's to talk, just like old times, amiright?" Frisk hesitantly looked up, searching his expression with their one eye. Sans' grin tightened. The eyepatch was really bothering him. Something about the kid hiding anything from him was enough to make him just a little wary.

"Let's just walk there this time, it really is a lovely day isn't it? Birds are chirping, flowers are blooming… hey, what's the matter?" Sans stopped at the doorway, and his eye sockets darkened at the sight of that expression, the one that had been making him wary since Frisk showed up with an eyepatch. Frisk was staring at him in slight horror and another emotion that he couldn't quite put his skeleton finger on. Guilt perhaps? Though, Sans couldn't think of any previous incident that may cause Frisk to feel any guilt. Their guild was known to be a very peaceful one, only participating in guild wars when challenged. There were no situations that could cause trauma to the tiny human child.

Frisk seemed to snap out of it, quickly pasting a smile on and walking past Sans. Sans didn't speak for the rest of the walk, too caught up in his thoughts.

He was still really worried. He genuinely cared about Frisk's well being, and although there were times that their trust was tested, Frisk had proved to be a trustworthy and loyal to a fault guildmate. He owed more to Frisk than he could even imagine. Frisk was why Sans and his precious brother had a roof above their heads and a loving guild to support them. From that day, when Frisk had reached a hand out to them, trusted them and made them an official part of the guild, Sans had tried to protect them along with his brother. He had a family now. A family who supported and cared for him as much as he did for them. But something was wrong now. The day Frisk had shown up with that eyepatch, he immediately knew something was off. They didn't have as much energy, seemed resigned and defeated. At first, Sans suspected bullies. Snowdin was generally a very friendly town, but it was not unheard of for teenagers to pick on weaker targets, he had seen it with his own eyes, how cruel the younger monsters could be towards each other. But when he acted on his suspicions, tailed the human for the entire week, he found nothing. Nothing was out of the ordinary. Frisk would shop, chat with locals and rival guild members, even do some friendly chores, but no bullies showed their faces. Sans didn't know what to do. If it wasn't bullies, what could be bothering the human so much? He hoped he would find out soon, as he gazed at the foggy windows of Grillby's.

He led Frisk in, exchanging greetings and friendly banter with the regular customers in the warm bar. He eventually made it to the two stools that Frisk and he would usually sit in. He even grinned when the human handed him a woopee cushion with a cheeky smile and slight giggle.

"Hey Grill, we'll have two orders of fries." Sans grunted out, waving at his old friend. Then the smile dropped from his face.

"Kid, you've been hiding things from me lately." He eyed Frisk from his seat, eye sockets darkening at their nervous reaction.

Frisk played with their hands, refusing to look Sans in the eye. "Sans, I… I just don't think this concerns you or the others. It's really just my problem." They muttered, glancing guiltily at their best friend.

Sans sighed, this was really fraying his nerves, trust issues weren't good, especially with the looming date of another tournament. "Your problems are the guild's problems, there's no way that any of your problems aren't going to affect the guild at some point. Plus, the others are starting to worry too, your eye has been like that for a month now. Why won't you just tell us what's wrong?" He watched as Frisks mouth bent into a frown, eye glaring at the wood in front of them. They seemed remorseful about their next words.

"I'm sorry Sans but, you really shouldn't know, it's nothing big really. I've just been...a little more tired lately. My eyes healing, I...promise. And they don't have to worry! Just a little time and my eye will be back to normal. I think."

Sans gripped the bar in frustration. Couldn't Frisk see that hiding things were only hurting the guild more? Toriel was worried everyday the kid stepped foot outside, Undyne was working herself to the ground, thinking that she could find the 'bullies' who were messing with Frisk, and he was already sick with suspicion and worry.

"That's...that's fine then. Just remember,you can tell me anything. I can't bear to see you hurting like this." Sans' eye sockets widened as he caught Frisk's response, though he doubted the human noticed that Sans heard the whispered reply.

"You need to stop lying to yourself Sans."