what if a confident and sociable gemini falling in love with an insecure fourth who maintains a protective emotional barrier

It's just one week, seven days of pretending to be Fourth's boyfriend. What can possibly go wrong? -- ("It's just for a week!" Fourth is almost begging at this point, "and it's just play pretend!" "And what do I gain from this?" Gemini asks, eyebrow raised, and damn. It is a very valid question. "Um... my unending love and support?" "And?" "An amazing dinner spread and a favour I will owe you for life." Fourth says, and Gemini snickers. "I can give it to you in writing, redeemable whenever and how many ever times you want." "Okay, I guess." Gemini starts laughing as fourth does a little victory dance. "Only because your mom's cooking is out of this world.")