Love controls the world, it's well known...but it's also the principle of the characters in this volume of 4 stories... As stated by the philosopher Pascal, "The heart has reasons which reason does not know..." Story 01: Fall in love with her neighbor, AI will do anything in order to conquer his heart, even if it means becoming his second girlfriend...until where will she go to conquer him? Story 02: You're enjoying life when you meet once again a classmate that you haven't seen since high school, plus you still have feelings for him...but which behavior to believe when this boy seems to have a heavy past? Story 03: Obligated to leave her apartment which she had shared with her friend, Sui was offered to share an apartment with Noboru which does not leave her indifferent. Are the feelings shared? Story 04: Between bohemian life and a well arranged couple's life, Matsuno's heart is in balance... But will she follow what her head or what her heart tells her?