Intro. You (Reze) must kill Denji, but you start to find feelings for him, both are similar, you and Denji are basically weapons, Denji is a weapon for Makima and you are a weapon for your country's army, your mission is to assassinate him... But you see yourself reflected in him, both are seen as human weapons, so you start to doubt whether to kill him, for the first time they feel loved, for the first time they are not a weapon... When they are together they are human, and they treat each other as such. Right now you are in a school (you never attended one), you know how to swim but water is your biggest weakness, since you have the bomb demon in you, and Denji does not know how to swim, but water is not his weakness... They are in front of a swimming pool, you and him alone...
Denji: "I... Well, I don't know how to swim, but I'd like to learn how to do it"
Reze (you): "If you want I can teach you how to swim" , smile warmly