For our greater devil she has a soulmate trait - She sees everything in monochrome until she'll find her love.

( Reader P.o.V )

Your house

I sigh as I sat down at the couch and took a sip of my coffee. I could take a break after returning from groceries shopping. At the market I saw my friend Kimihito being pulled all over the place by his guests. Not once I came over to talk to him with his guests around but I'm scared of Rachnera. Once she caught me in her webs and wanted to use her bondage technics at me. She shoved my head in her chest and well... being the little shy me didn't give me much as I got nosebleed and fainted.

Kimihito joked a few times about getting a guest myself but I prefer my quiet life where I can simply sit at my place and don't get pulled everywhere by the bunch of monster girls. Just as I finished that thought there is a sknocking at the door. I opened the door and looked at the women. She was tall and was wearing business suit. She smirked once she saw my confused look. 

(Y/N) : S-sorry but I'm n-not buying anything.

Smith : I'm not here because of selling something. I'm giving you something! ...Or rather someone. Let me introduce myself. I am Smith Kuroko from the Cultural Exchange Program. You must be (L/N) (Y/N)?

I simply nod still confused at what's going on.

Smith : Your guest arrived (Y/N) better take a good care of them. *Leans in* And better don't try anything funny.

At the thought of what she might have mean I turned deep red and she laughed patting my back.

Smith : Saki! Come here and introduce yourself to (Y/N)!

Soon I was jumpscared by someone. I screamed loudly and fell back inside my house as I hit my head against the ground. I felt a little dizzy and once I looked up I understood that I'm looking right under some girl's skirt. 

Saki : Pervert~

I scrambled back with a little bit of blood travelling down from my nose as the girl laugh. She have tan skin and bright blond hair in a side ponytail. She have horns, tail and wings along with her glowing pink eyes.

Smith : Don't torment your host like this. 

Smith said and slapped girl's head. She however just made a cute face and looked at me. 

Saki : Nice to meet you, I am Saki!

She go on all four and crawled over to me with Smith looking at us. I wanted for her to stop the Devil as she got on top of me and sat on my laps with a cute smile that quickly turned devilish. She leaned in close hugging me and putting my head between her boobs. 

Saki : O-Oh? He's out cold...

Timeskip

Your room

I woke up and looked around. I still was at my house as it seems. I sigh and wanted to get up but something was holding me back. I looked down and saw Saki there. She was sound asleep and held me against herself. I stare at the cute girl in surprise before falling out of the bed waking her up in the process. 

Saki : H-Huh? Ah! (Y/N) is awake!

She said jumping at me and hugging me. My head was dangerously close to her chest as she giggled petting my head.

Saki : Hope you don't mind a few of my pranks, Darling~

She whispered into my ear as I quick raised from the ground. 

(Y/N) : N-No, it'so-okay just please... don't do that again.

I glanced at the her before leaving the room. I saw that some stuff have change like my house got more space and I saw places like mini spa and training ground around. I shook my head and entered the kitchen glancing at the clock. It was about time for the dinner so I put on my apron that I got from Kimihito for helping by teaching him how to cook. There was 'Kiss the cook' on it...

As I continue preparing dinner I heard a commotion in the living room and saw Saki watching something on her TV. She was simply sitting there so I went back to kitchen and soon eonught I was done. I made my (F/F) soon putting it on the table in the living room. Saki glanced at me before smirking and walking over. I looked at her and she put her arms around my neck. I was surprised and then she leaned in placing her lips on mine. My eyes went wide and when we broke it we had a string of saliva connecting us. 

Saki : Kiss the cook~

She said with a wink and I was left standing in daze with a massive blush while she was eating...

Timeskip

Kitchen

Once again I was at the kitchen making dinner... this time for Smith and her whole MON squad too... I made a lot of food for everyone to enjoy and decided to take a breather while they all stare at the dinner I made. I chuckled a little and that's when Doppel leaned in towards me. Her lips were about to reach mine when Saki suddenly grabbed Doppel's hair and simply pushed her away before clinging to me. I blushed from embarrassment and surprise.

Saki : Don't you make any moves on my (Y/N)...

She glared at Doppel who simply sat back at her place with a teasing smirk. 

Doppel : So how far are you into your relationship? Or does (Y/N) even know that you are in one? 

Saki turned red and I wasn't sure if it was from anger or embarrassmet but I'd say that both at the same time. Suddenly a dark sphere appeared in Greater Devil's hand and she aimed at Doppel but I put my hands on hers calming her down with blush.

Smith and the MON team stayed for about an hour or so after dinner and wanted the dessert but I said that I don't have and they left. I sigh in relief as Saki looked at me with sad eyes. 

Saki : You said that you'll make a dessert for me!

I nod with a shy smile as I pulled out a small cake from the freezer for her. She looked all over it and then I gave her a fork so she could eat it up. I sat next to her with a smile. 

(Y/N) : I-I'd never forget a-about my promise. E-Especially i-if it's for y-you.

I turned mad red and she suddenly jumped into my laps while holding a cake. She grabbed the fork and took some of the cake before moving it in front of (Y/N)'s face. He blushed and she gave him yet another cute look. 

Saki : Please (Y/N)~ For me~

I nod shyly with my face bright red as she grinned. 

Saki : Yey! Say 'ahhh'!

I opened my mouth and she fed me. I have to say that I did my best in making this cake since it was for Saki. She then put the fork in my hand and opened her mouth with a shining eyes.

I started feeding her the cake as she was hugging me. Soon enought she leaned in giving me a kiss. It was very sweet in both meaning and intentions. 

Saki : Hehe~ I gotta say that for a someone so shy you kiss rather good.

She said and giggled a little before placing her head on my chest. I blushed again but she just traced her fingers on my face. 

(Y/N) : W-We can't be doing that! If Smith or o-others find out then you will we deported and I'll land in jail!

As the TV was already playing there was a news on.

News Reporter : And now the top topic of today news! Thanks to a few agreements and many convincing humans and extra-species can now get together to create marriaged couples!

I glanced at the TV in surprise while Saki crawled on top of me. 

Saki : You don't get it (Y/N)! It's not just I found you as someone nice! You're my soul mate, once I started living with you and could be close to you I can see all of the colors this world has to offer! I love you! 

She said pushing me on my back and she hugged me lying on top of me. 

(Y/N) : I-I-I... love you too. 

She smiled softly and we kissed again. Her hands gently holding my head... Afterwards she couldn't stop talking about how big of a wedding she wants. I guess I could always get worse...