This was your first night together as a couple.
You and Kasuga met in a way that made you feel as if it was fate who brought you together and, since then, you two built a connection since the beginning, but didn't have the guts to tell one another.
Now you felt stupid for even doubting his feelings towards you. But, could you blame yourself? He's so nice with everyone that you didn't even realize if he was flirting.
Now you think it was worth it because it has been the best night in years. You felt a little flustered because even though you were both adults, you felt like a teenager in love having the first time with someone you considered the love of your life.
You don't know for how long you've been awake by now, staring at his bare back, his tattoo on full display for you to see, his muscles moving as he breathed deeply in his sleep.