Bruh. Everything about Kayo, her dog, and the guy who wanted to marry her reminds me of Maison Ikkoku. Kayo and her dog are a bit like Kyoko and Soichiro-san while the guy looks a bit like Yotsuya.
Can't believe there's a woman alive who'd want to marry that old fart. But I guess if there wasn't anyone like that Ryunosuke wouldn't be born.