Time Travel Training, Am I the Savior of Class D?

I was tired of life and wanted to end it all, but unexpectedly, I accidentally traveled to the world of practical teaching? Hirata Yosuke: "Sakai-kun, you are a trustworthy partner." Kushida Kikyo: "You are not a good person either." Ryuuen Sho: "It makes me feel more and more happy, Sakai Chino." Ayanokouji Kiyotaka: "Sakai Chino, you also have secrets hidden in you." "We are all of the same age, I didn't want to attack you with dimensionality reduction!" "I have been honest, please let me go." "I want the real thing!" Helpless people are being nurtured, Sakai Chino, Shen Shang!