Osomatsu-san Oneshots (Book 4)

Embarrassing 🍋(Karamatsu x reader) Lemon

I'm basing this off a new headcanon that I've discovered about Karamatsu. I hope you guys enjoy😅

Today I was spending the night at my boyfriend's place. The reason being that my apartment complex was being sprayed for pests. Luckily, when I mentioned this to Karamatsu he offered me to stay with him and his family. So I was staying there until my apartment was ready to live in again.

Now Karamatsu and I have been together for a whole year now. Karamatsu is my first boyfriend and I'm happy to have him in my life. He was the sweetest, nicest gentleman I have ever met. He has so much love to give and is very affectionate. I'm lucky to have him.

When I got to his place he instantly pulled me into a hug. "Y/n, I'm so glad you're here~ I've been waiting for you to arrive" he says with a smile and I giggle softly "I figured. Well I'm excited to be here" I say and he pulls away "here, I'll take your bags to your room. Go ahead and make yourself comfortable" he says and I nod before walking to the living room while he walks upstairs

In the living room was Osomatsu watching TV. He glances up and hums "Oh hey y/n, what are you doing here?" He asks and I sigh "my apartment complex is being fumigated" I say before sitting down and he hums "oh okay" he says and I nod before watching the TV. Osomatsu hums and glances at me "So...how are you and Karamatsu doing?" He asks and I hum before smiling

"We're doing well" I say and he hums "good...have you guys done it yet?" He asks and I blush hard before stammering out "N-No..why you ask?" I ask and he hums "Just curious...but mind if I tell you something" he says and I raise an eyebrow "...Sure" I say and he hums before glancing around "I just thought I should let you know that Karamatsu isn't...packing much."

I hum and tilt my head "..What?" I ask in a confused tone and Osomatsu sighs "You know...he's not packing...he's not.." he trails off and just points down. I hum and glance where he was pointing before blushing hard "You can't seriously be trying to warn me that my boyfriend has a small..." she trails off as well before she sighs "I don't wanna think about this" she says before gripping the sides of her head with a groan

This was the very moment where Karamatsu returned and glances over at me and Osomatsu. "Um...what happened?" He asks and Osomatsu hums "Oh nothing, just gave let her know what to expect when you two finally get to do it." He says before getting up to quickly leave the room.

Karamatsu was silent in thought before blushing hard in embarrassment "You did what?!" He exclaims and I glance up at him "um..Karamatsu...it's really nothing to be embarrassed about." I say and he hums "...Really?" He asks with a faint blush still on his face and I nod "Yeah...and I mean, you would be my first so it's not like I have anything to compare it to....how big is it anyways?"

Karamatsu blushes and glances away with a sigh before holding up three fingers with a hum. I hum and glance at his fingers before looking up at him. "Inches?" I ask and he nods with a hum, blushing a bit harder. I hum and sigh "well...that's okay" I say and he sighs "don't say that...I know it's not...it's not exactly big enough to do anything.." he mumbles softly and sighs as he walks away to the kitchen

"This is exactly the reason I put off doing anything"

It's been 3 days since I arrived and Karamatsu has been sulking throughout most of my still. He was still very embarrassed. Sometimes I would catch him mumbling about how I must be so disappointed or ashamed. Well, today was the day I had enough. Today I was gonna boost his self esteem and I knew just what to do.

What was perfect about today was that Karamatsu decided not to go to the bathhouse tonight, saying how he'd rather just take a quick shower and head to bed. So I waited until he entered the bathroom to go through with my plan. I wait until I hear running water and strip myself down before walking in with a towel around my body.