YOU SAID:
Senpai is back, and Senpai loves you!
INTO JAPANESE
先輩が帰ってきた、先輩はあなたを愛しています!
BACK INTO ENGLISH
Senior is back, senior loves you!
INTO JAPANESE
シニアが帰ってきた、シニアはあなたを愛している!
BACK INTO ENGLISH
Seniors are back, Seniors love you!
INTO JAPANESE
先輩が帰ってきた、先輩はあなたを愛しています!
BACK INTO ENGLISH
Senior is back, senior loves you!
INTO JAPANESE
シニアが帰ってきた、シニアはあなたを愛している!
BACK INTO ENGLISH
Seniors are back, Seniors love you!
it is unlikely that this phrase will ever reach equilibrium