Gakuto won a diary. Wondering what to write as the entry, Mikoto mentions, "You can also write about your thoughts and feelings." Encouraged by this, Gakuto chronicles the daily happenings in the Yuzuki household...
...at the same time, you're also my rival.
und der Rivale,
der mein Herz heftig ins Chaos stürzt.
pero también un rival
que perturba intensamente mi corazón.
mais aussi un digne rival
qui sait me mettre dans tous mes états.
allo stesso tempo, sei anche un rivale 
capace di rendere il mio cuore tormentato.
ao mesmo tempo, você é o meu rival.
но в то же время ты соперник,
что вечно бередит мне душу.