Onodera Ritsu has just transferred from his father's publishing company to Marukawa Shoten. Assigned to the shoujo manga division, he crosses path with the person he'd least expected to meet. Takano Masamune is the editor-in-chief of the division Ritsu's been assigned to, and the two seem get off on the wrong foot right from the very start when Takano unexpectedly kisses him. However, there is more to than what meets the eye: Takano is actually Saga, Ritsu's senpai and high school love, whom Ritsu had thought to have played him for a fool by taking his affections for granted when he confessed and summarily dumped him.

Episode 0 - No love's like to the first.

Episode 1 - First Impressions are the most lasting

Episode 2 - A man has free choice to begin love but not to end it

Episode 3 - In love there is both dotage and discretion

Episode 4 - Adversity makes a man wise

Episode 5 - Love is lawless

Episode 6 - Go to the sea, if you would fish well

Episode 7 - Coming events cast their shadows before them

Episode 8 - Looks breed love

Episode 9 - The die is cast

Episode 10 - Absence makes the heart grow fonder

Episode 11 - It never rains but it pours

Episode 12 - After a storm comes a calm

Episode 12.5 - The quarrel of lovers is the renewal of love.

Episode 13 - A good beginning makes a good ending

Episode 14 - One cannot love and be wise

Episode 15 - Lingering love breeds mistake

Episode 16 - Delay in love is dangerous

Episode 17 - Follow love and it will flee thee, flee love and it will follow thee

Episode 18 - Love is without reason

Episode 19 - Actions speak louder than words

Episode 20 - Love and envy make a man pine

Episode 21 - Love is blind

Episode 22 - Love goes never without fear

Episode 23 - Love makes the world go round

Episode 24 - Love is bittersweet

Studio DEEN

Lantis

Sekai Ichi Hatsukoi - The World's Greatest First Love