A marriage by agreement, tying two strangers under the same roof. He is an upstart in the business world, calm and restrained; she is an illustrator, gentle and reserved. There is no throbbing of love at first sight, only milk for breakfast day after day, the light that stays on when returning from overtime at night, and the pills that are silently placed on hand when you have a cold. From being polite and distant to getting used to each other's presence, from being respectful to each other as guests to being reluctant to be separated. When love quietly grows in the trivial matters of daily life, they discover that the best love is not a vigorous encounter, but a person who gradually becomes indispensable in each other's lives.