Can anyone explain to me what happened in the latest chapter? I'm so confused

They are on a nice lil date and an oni attack broke out. (Can’t remember their names) top wants to help control the outbreak, but bot is scare that he might not come back alive, remember he lost someone dear? So he’s scared of losing someone dear to him again. That was why he asked him to take the gun but the guy wants the bot safe, so he told him to hide there.