Source: https://ncode.syosetu.com/n6016io/
Synopsis
The main character, Kujo Yuito, has a twin brother, Kujo Ayato, who can do everything perfectly. Yuito, who is not one step ahead of Ayato in everything he does, has come to be called a degraded version of Ayato.
Therefore, he even thinks it is inevitable that his first love Yuuki Suzuno, his childhood friend, fell in love with his older brother Ayato instead of him.
Therefore, Yuito does not even dream that Suzuno’s sister Yuuki Kano, who is also the person Ayato loves, is morbidly in love with him.
Prologue
Episode 1 – You should ask my brother that
Episode 2 – Because Yuito has a lot of good qualities that Ayato doesn’t have.
Episode 3 – Yeah, and I erased that girl’s contact information as well, just for the heck of it
Episode 4 – Hmm, so that’s how Yuito thought of me
Episode 5 – Hmm, maybe to prevent other girls from coming to Yuito?
Episode 6 – Yeah, Yuito won’t get in touch with Suzuno chan anymore
Chapter 1
Episode 7 – Hey, isn’t it kind of exciting when a man and a woman are alone in a closed room?
Episode 8 – So let me be clear, I have no intention of dating Ayato.
Episode 9 – Yeah, in that case it’s okay because you already have permission
Episode 10 – As Yuito knows, it’s really hard to be popular
Episode 11 – Yeah, it’s a hotel with a [love] sign, so there’s plenty of room even on that very day.
Episode 12 – What are you saying? You’re going with me, Yuito
Episode 13 – I’m planning on having Yuito wash everything, including my breasts and that part, okay?
Episode 14 – Yuito, you’re quite bold despite your appearance
Episode 15 – But I’m definitely going to make him mine, no matter what it takes
Episode 16 – I’ve caught you, I’m not letting you go tonight
Episode 17 – I wanted to make a strong connection that would never be broken, no matter what
Episode 18 – Hmm, should I call you my boyfriend?
Episode 20 – I meant what I said earlier about making a move on Yuito
Episode 21 – Don’t underestimate me, I’m the best when it comes to self-protection
Chapter 2
Episode 22 – I’m Yuito’s girlfriend, Yuuki Kano, nice to meet you everyone
Episode 23 – Besides, it wouldn’t be a good idea to interfere Suzuno chan and Ayato’s date
Episode 24 – Yuito, are you perhaps excited when I said you’re a virgin?
Episode 25 – Of course, who do you think I am?
Episode 26 – By the way, have Suzuno chan and Ayato done it?
Episode 27 – Well then, I guess I should take off your pants and underwear
Episode 28 – Even though you said that, your body seems ready, Yuito
Episode 29 – Wait for me, Yuito, and I will definitely make you mine, both body and soul
Episode 30 – But Yuito’s mental strength is far greater
Episode 31 – Do you need a reason to voice call someone you like?
Episode 32 – If it were my sister, this would never happen
Episode 33 – Hmm, so Yuito tried to lie to me
Episode 34 – Don’t we look like a couple to those people?
Episode 35 – But I want you to remember that there are people who will be sad because of that
Episode 36 – If you have any trouble in the future, I will help you
Episode 37 – I see, Yuito was trying to help me
Episode 38 – Then, how about I make you lose your virginity?
Episode 40 – But in the future, the person who will be beside Yuito is not Suzuno chan, but me
Episode 41 – Don’t we look like a couple or a married couple now?
Episode 42 – If that happens, it would probably be difficult for the two of them to keep dating
Chapter 3
Episode 43 – Don’t tell me you’re flirting with another woman even though I’m here?
Episode 44 – Perhaps Yuito is a pervert who gets excited by touching my swimsuit?
Episode 45 – Geez, don’t tell the whole story so quickly
Episode 46 – Sorry, sorry, would you like to touch my breasts as an apology?
Episode 47 – I’m not ashamed to show every inch of my naked body to Yuito whom I love
Episode 48 – Oh, and don’t get so horny that you try to undo my top
Episode 51 – Speaking of which, didn’t you have something to tell me, Yuito?
Episode 52 – I feel bad for Suzuno chan and Ayato, but we will win
Episode 53 – Heh, so Yuito is flirting with Suzuno chan while leaving me alone
Episode 54 – Ah, maybe Yuito seriously wanted to marry me?
Episode 55 – Eh, by big, you mean this?
Episode 57 – Because, you know, Yuito seems happy to be bullied by me
Episode 58 – Eh, it’s just getting exciting, so let’s continue for a little while
Episode 59 – Oh, is it possible that Yuito is already planning to marry me?
Episode 60 – Ah, I’m a little hurt by that reaction
Episode 61 – Yuito said it looks good on me, so there’s no need to hesitate
Episode 62 – So even if we get married, let’s make sure we don’t fall like Orihime and Hikoboshi
Episode 63 – Since Yuito and I are now classmates, honorifics are prohibited
Episode 64 – Then, from now on, you can call me by my first name.
Episode 65 – Do you really want to spend your college life with me that badly?
Episode 66 – Damn, I also wanted a beautiful step sister fiancee
Episode 67 – Does Kano san really like Yuito….?
Episode 68 – I wish I was in Yuito’s place
Chapter 4
Episode 69 – I wish you would answer more happily since it’s your beloved sister calling
Episode 70 – Wow, it’s definitely me
Episode 71 – Are you perhaps proposing in a roundabout way?
Episode 72 – It’s not like we’re going to kiss or anything right now, so it’s fine
Episode 73 – Come to think of it, there was still punishment left for Yuito, right?
Episode 74 – Eh, I’m just moving moving my hand as hard as I could while thinking about Yuito
Episode 75 – Nice to meet you, my name is Yuuki Kano, I’m Yuito’s fianceé
Episode 76 – Eh, you’re crying face is so cute, I wanna take a look closer
Episode 77 – Hmm, I personally thought it was light
Episode 78 – Yeah, that’s why after I make Yuito’s body and mind mine, I’ll behave quietly
Episode 79 – Ah, maybe you take it in a sexual way?
Episode 80 – So how about we kiss more intensely from now on?