Sasai looked at the clock, made a troubled gesture, and then looked at me."I actually want to talk to you more, but... it's getting late, so maybe you should go home, Sato-kun."The clock in the room was about to strike 6 p.m., a little later than the time I usually go home. I do think that I should go home, and if I stay too long, I'll get turned on by Sasai-san again. I have to suppress my excess sexual desire.Sasai changed into her own clothes, and I changed into my uniform. In the end, I didn't have time to wash my underwear, so I decided to put it in a plastic bag and take it home, and I was wearing my pants without underwear.Sasai said, "If you leave it here, I'll wash it for you..." but I had no choice but to refuse. I thought it was trash to make a girl wash my pants covered in semen. I couldn't cause her that kind of trouble.Still, I accepted her offer to walk me home since it was getting dark, and we walked together through the residential area. It was only about a five-minute walk, but she didn't want me to go home alone."..."There was an awkward atmosphere, and we continued walking without much conversation. I couldn't start a conversation unless she spoke first. I felt pathetic that I couldn't change in this way.Soon we arrived in front of my house. "Well, then... I'll be here, okay..." I said in a high-pitched voice, and Sasai turned to me and bowed."Um, thank you for today, see you tomorrow...!"And with that, she ran off, heading back the way she came. I didn't know how she was feeling, but there was no way I could ask her.When I could no longer see her back, I took a deep breath and unlocked the front door. Mom hadn't come home yet, and only Yuki and Yukari's shoes were there.Perhaps to calm myself down, I lined up my shoes more carefully than usual before heading to the living room. Yuki was in her everyday clothes and playing with her smartphone, but when she saw me come home, she came running over to me."Welcome back, Shun-nii! Today... well, how was it?"I felt like she'd seen through me, but I wasn't going to tell her that I'd had sex with a classmate. Even though we were family and I couldn't lie, there was no way I could say anything."No matter what you say... I was, well, studying..."I tried to pretend to be calm and let it go in my own way. Now that I think about it, Yuki had foresight when she encouraged Sasai and me to get along."I see," Yuki said, slightly raising the corners of her mouth, and leaned her face close to my ear."...I could see you talking in front of the entrance from my room."After a moment, I understood what Yuki had said. She had been watching me and Sasai talking. Indeed, the entrance was clearly visible from the room on the second floor.In that situation, I didn't know how to respond, so I just replied with conjunctions like, "Um, well, that's, um...". Not knowing what to hide, I was flustered.Yuki calmed me down by saying, "Ah, I'm sorry, Shun-nii, calm down...?", and somehow the conversation moved forward. In the end, I was a bad brother being led by my sister."I'm not angry or anything. Actually, I was just happy because you were right... I guess you've gotten to the point where you want to come home with me."Yuki's expression darkened slightly after saying that."But, you know, if you haven't forgotten what you said before about coming home with me,I thought, "I don't need you anymore. Of course, if you say I'm no longer useful to you, then that's it."Maybe I did something that made Yuki feel lonely. Even if I'm a bad brother, I understood that I had to clear up that suspicion immediately."...Yuuki is my precious little sister...I would never say you're no longer useful to me...Besides, I didn't make any promises with Sasai-san, so I was thinking of going out with you tomorrow...I'm sorry if I made you feel uneasy."Unable to put into words, all I could come out was an apology. It was an honest feeling, but maybe it was hurting Yuki."I'm sorry, Shun-nii...I didn't mean it that way...!"When I bowed my head, Yuki shook her head in a panic."Well, I'm happy just to hear you say that... so it doesn't change the fact that I want Asagi-san to get along, right? I was just thinking of something extravagant."Yuuki smiled and forgave me. I told her that I'd meet her at the same time tomorrow, which I'm truly grateful to as a younger sister, and she happily agreed.In reality, I've probably reached the stage of being friendly with Sasai-san. But going beyond that and having sex is not something I can tell people around me.Yuuki said, "I don't mind us getting along as well as we can." But I didn't know how far that meant, and I was still unsure how much I should tell Yuki.While I was worried in my heart, my daily life continued. After dinner and a bath, I started preparing for tomorrow, which was also my last day as a provisional member.I was thinking of showing up at the literature club, but before that, I had some concerns. When I get to school, what kind of face should I make to Sasai-san? It's something I've never thought about before.Will she say hello like usual? I don't even know, and the only thing I can think of is that if she says hello, I'll respond as usual.I'll probably behave more suspiciously than usual, that much I'm sure, and I've even started to feel resigned. I close my eyes in bed, but just remembering my time with Sasai-san would make me want to masturbate, so I consciously avoided it for today.With my shower out the way, I turned in for the night and had a dreamless rest.