@GeeKay
パンいち seems to be a contraction of パンツ一丁(pantsu ichou)
パンツ一丁 = (wearing only) a pair of underpants
尾上 = i suppose this is his name
じゃん is a contraction of じゃない = isn't it
so i think it will be something among the lines of "isn't it underpants okami?"
they need to be realistic: there is no relationship without even a tiny bit of self-interest, just acept the person that already acepts you for who you are.