First one is for a competition by MayaTablet

I didn't ever understand. 

"You were supposed to stop me!" the villain cried, cradling the hero's lifeless body. "You were supposed to save the world and defeat me! So why-" the choked. "Why am I still here?" their voice trembles as tears began to fall. "Please, wake up! I can't do this alone..."

"O, come on! This show is so lousy!" Nightmare groaned. He switch off the telly and nearly trashed the remote. He turned to see Lynx- Wait, no.

That isn't Lynx.

That's Matcha. 

She sat quietly next to him, not making a sound. He could tell, however, that she was visibly crying. Matcha knows how to control herself to refrain sobbing and hiccups, but she can't stop her tears. 

"Hey Mat, what's up?" Nightmare bent forward to see her face, but she didn't seem to have a solid expression. She had a mixture of sadness and fear in her eyes, but her face showed complete blankness. Her aura was even worse. Nightmare could sense an array of negativity coming from her: fear, anger, sadness... it was a lot. 

"Mat, hey, Matcha, say something." he waved a hand in front of her. She turned away. 

"You've seen me before. I've caused a lot of pain and torture not only to Lynx but to those around her. I know my capabilities and powers, but I can't forget." Nightmare wanted to use 'Is it because of both your powers of time?' as a joke to her, but he didn't see the good in that idea. 

"Are you still doubting yourself? Actually, why are you doubting yourself?" Nightmare knew Matcha needed time to know that the others know she cares and that she's a good person, but he didn't know WHAT is making her doubt. 

Nightmare looked at her. she looked at him. "O, O... sorry. I was just talking philosophy. Lust Oni taught me philosophy today." Nightmare slapped his skull. By Asgore! 

"You made me worried Mat!" said girl rolled her eyes. "I am unpredictable, Nightmare." "O yes?" Nightmare challenged her. She looked at him. "What's the big idea?" "Because you can't stop me from this!" he pinned her to the couch and gave out a tickle attack. "Hey! Stop it!" she broke into a fit of laughter. Nightmare stopped and looked at her. This girl was known to be the bad side of his best friend, but all she is, is just a misunderstood princess trying to strengthen Lynx, the only person who cares about her, through violence. To put it into perspective, it's like Toriel trying to protect Frisk from the dangerous Underground by fighting them to make them stay in the Ruins. Just like Toriel doesn't know any better way to save Frisk, Matcha's mentality is bent by the Shifter's traditions and way of living, and other Shifters grow stronger through violence. She thought Lynx would grow strong enough to defend herself if she forced FIGHT into her, but it took her a long time to realize that Lynx grows stronger through mercy and kindness, just like Frisk telling Toriel: "I don't want to fight." 

Nightmare pet her head and asked: "Wanna grab a burg?" Matcha frowned. "Ew, no, that dish is disgustingly greasy!" Lynx laughed in her mind. By Asgore, Matcha's gross-out reminded her of Papyrus, who too hates grease. "Spaghetti then, Nyeh heh?" Matcha slapped her forehead at Nightmare's joke. "I am NOT Papyrus." she groaned.

"Right, right, what would you like?" Nightmare shifted himself so he was on her lap. "Probably a pomelo." 

(Info: Pomelo is a natural citrus fruit, similar looks to graprefruit [Because grapefruit is a hybrid of pomelo and orange.]. Largest fruit of the Rutaceae family.)

Nightmare laughed. "Fine. You act like a vegan even thought you don't hesitate to kill." Matcha grinned. "I dislike greasy foods, but grill and roast are exceptions. Many vegetables are inedible raw, and I prefer to eat raw fruits and vegetables. Healthy, non-greasy and won't make you fat." 

Nightmare looked away. "Right. Fine, I'll see if I can find that fruit. It's freaking Asian so I doubt we can find them easily." Matcha stroked the top of his skull. "It's alright." 

(MatchaMare up ahead!)

Nightmare blushed a soft cyan while burying his face into her abdomen. She chuckled and blushed pink in return. "Hey, that tickles!" Nightmare grinned and sat up, burying his face into her neck this time.

(I remember some saying that Sanses have sensitive necks.)

Her face rivaled that of cotton candy (Cuz pink) and Nightmare liked that. Nightmare admired the way Lynx and Matcha were so darn unique. They aren't skeletons, neither are they humans. They are a monster type called Shifter (As mentioned above) and they are just as interesting as the other monsters of their once beautiful AU, now in pieces from Genocide. 

He carefully breathed onto the sensitive skin, making the princess shudder. She was known to be the dominant one when it comes to control, but here she was, being played by the King of Fears. Nightmare smirked and looked at her face. Man, she was pink. He knew Lynx could blush pink and red, so Matcha should be able to do the same. 

"Do you ever go red?" he decided to know. "I've only gone red once, when you fell on me in that awkward position." Nightmare decided to accept the challenge and make her go red. 

He entwined his bony fingers into her yellow locks and held her head firm. He could tell she was submitting, her pink lynx ears were drooping. "Right, you've never been submissive before." he knew this would risk her pride, but then again, she gave up her pride as a princess to join Lynx's family. He gave her a very soft peck on the lips.

Well, that was fast.

Matcha went red.