(Internet slang) an excessively cutesy style of writing stereotypically used by middle-aged men (thus making it inappropriate and creepy) on the LINE messaging app

人文学: humanities

fill-in-the-blank text

one part

(somewhat childish) a kiss

to kiss, smooch

a squeak (sound made by mice) / a chirp (sound made by small birds) / sound made by sucking liquid

(archaic) Short for と言う (to iu):

The hiragana syllable ちゅ (chu). Its equivalent in katakana is チュ (chu).

下知: a command; an order