Yui makes you dinner as thanks for helping her out with her studies. You both spend somee fun times together, but then Yui gets the results of her mock exam and is depressed. One snowy night before her entrance exams, you spend a nice evening together.
It's to thank you for 
always helping me study.
هذا لشكرك على مساعدتي في الدراسة
Ich muss dir danken, dass du
mich immer beim Lernen unterstützt.
È per ringraziarti del tuo prezioso aiuto con lo studio.
É para agradecer você por
 sempre me ajudar a estudar.