Yuna, Natsu, Happy, and Zoey had just arrived at their cottage. Happy and Zoey went straight to the couch, curled up together, and fell asleep. Yuna walked through the cottage as nostalgic memories flooded her brain. She stopped at the only bedroom in the cottage, remembering the days she shared the bed with Natsu, cuddling with him as his warmth put her to sleep. As she stood in the doorway reminiscing, Natsu snuck up behind her and wrapped his arms around her torso.
"We used to sleep together in here." Natsu said, recalling those nights when Yuna used to live with him.
"Yep, those were the days." Yuna said while continuing to recall the warm pleasant memories as Natsu buried his nose in the crook of her neck, inhaling her scent.
"Back then, we were too innocent to understand intimacy." Natsu chuckled as he pressed his hips against Yuna, allowing her to feel his growing erection. She blushed, immediately realizing where this was going.
"Yuna, I want to make new memories here... as adults." Natsu said lowly as Yuna's blush became even more apparent. He turned her face towards his and began kissing her passionately. As they kissed, Natsu closed the door to the bedroom behind them. He hoisted Yuna up into his arms and carried her to the bed. He gently set her down on the sheets and got on top of her, not once breaking the kiss. She reached up, locking her hands behind his neck. Natsu reached behind her and grabbed the zipper to her dress and unzipped it. He pulled away from the kiss so that he could slip Yuna's dress off her body. He stared at her in her white lace lingerie for a while before proceeding to remove those as well.
"Hey no fair! You're still fully clothed." Yuna said with a pout as Natsu chuckled. He took off his shirt and removed his pants and boxers. His erection sprung up, freed from the restraints of his clothes.
"Happy now?" Natsu asked as Yuna nodded. He crawled back on top of her and began kissing her again. Their tongues danced together as his hands roamed up and down her body, stopping at her breasts. He massaged them, making her moan into the kiss. Natsu then pulled away, a silver strand of saliva connecting their tongues. He then trailed his lips across her skin until he got to the base of her neck where her sweet spot was. He bit down lightly and began sucking on her neck as small mewls of pleasure escaped her lips. As he did, he removed one of his hands from her breasts and slowly slid it down her body until he reached her sensitive folds. He slipped a finger inside her core and began to pump it in and out of her.
"Ah Natsu~!" Yuna moaned out as he continued to pleasure her. She squirmed in ecstasy beneath him. Natsu's mouth traveled from her neck to the breasts he wasn't massaging and latched onto the pert bud on the mound of flesh and began to suck on it. At the same time, he gradually added more fingers until all four of them were inside of her while he used his thumb to rub her clit, adding to the pleasure she was feeling. He also increased the pace at which he thrust his fingers. Yuna was nearing her climax, her moans growing louder by the moment. But right as she was about to release, he removed his fingers from her core. She whimpered from the loss of physical stimulation.
"Natsu please... I want you inside me~" Yuna pleaded. Natsu complied as he aligned his penis with her folds and slid himself inside. He was bigger than Asta and Izuku who were roughly the same size. Asta was slightly bigger despite him being shorter than Izuku by 11 cm (4 inches). Izuku wasn't small by any means, but Asta made up for his height in length and girth.
"Yuna... You're so tight. I can barely hold myself back." Natsu breathed out as he remained motionless so she could get used to his size. It was taking all his willpower to not pound into her. He was trying to be considerate, but in reality, the lack of physical stimulation was driving Yuna crazy.
"Then don't. Take me now." Yuna said, reaching up and cupping Natsu's face in her hands. He nodded and started thrusting at rapid pace. She wrapped her arms around him as he pounded into her.
"Feels so good inside of you... Ah~!" Natsu moaned out as he continued to thrust into Yuna. He lifted her legs and placed them on his shoulders, allowing him to reach deeper inside of her. The sound of moans and skin slapping against skin filled the room as they made love. Natsu loved it when Yuna became a moaning mess because of him. The way her hair became disheveled, her lewd facial expressions, the erotic sound of her voice, it all drove him crazy. With each passing second they got closer to climaxing as they dove deeper into the depths of pleasure together.
"I'm... gonna cum." Natsu announced as his thrusts became more frantic. He gave one more powerful thrust as he released his semen deep into her core. Yuna could feel his penis twitching inside of her as he filled her to the brim with his warm seed. As they came down from their orgasmic highs, Natsu lovingly placed his hand on her head. Yuna reached up and caressed his cheek with her hand. They smiled as they stared into each other's eyes.
"I love you Yuna." Natsu said as he leaned forward and kissed Yuna's forehead, making her giggle from the ticklish feeling of his lips on her head.
"I love you too Natsu." Yuna said as she gave him a quick kiss on the lips. Natsu chuckled as he pulled out of her and lay next to her on the bed. He pulled the covers over them and wrapped his arms around her. Yuna snuggled up closer to him and put her head against his chest. She could hear his heartbeat. It was still beating fast from the intense love session they just had. Eventually his heart slowed down to its normal rate.
"I don't know about you, but I'll cherish this memory forever." Natsu said as he pulled Yuna even closer to him.
"Same." Yuna said as she placed her hand on Natsu's chest. They just laid there in bed under the covers in each other's arms. The combination of his warmth and the soothing sound of his heartbeat was slowly putting Yuna to sleep. Natsu was starting to get sleepy too. He gave her one more kiss on the top of her head before they both drifted off to sleep in a naked embrace.