Sleepless Beauty

Sleepless Beauty Manga :

'I wish I could share my sleepiness with you, Oz-san.'
Designer Kotou, who has trouble sleeping, secretly respects Amemiya, a junior employee in another department. He admires the way he can quickly turn down a drinking session he doesn't feel like attending, and the way he takes a nap in exactly 15 minutes during his lunch break. Kotou, who has a tendency to overthink things and is unable to get along with others in a safe manner, looks at him with envy.
On his way home one day, Amemiya invites him out for a drink, and with the help of alcohol, Kotou spills the beans about his insomnia problems. Afterwards, he decides to let the drunken Amemiya stay at his house. There, Amemiya proposes "sleeping in a sofa" as a solution to his insomnia - and what happens?