I became a heart-stealing thief in Azure Files

(Ari World content)
...Wait a moment. I need to clarify a few things first.
First of all... I am the sensei here, and you... are my 'students'?
"Yes"
What are you doing?
What does it mean to "have developed a special relationship with Sensei and there is no turning back"?
What does it mean to "spend a long game with sensei..."?
What does it mean when "one's heart is stolen by a heart thief"?
"Isn't this what you've been doing all along, Sensei? Under the guise of 'transactions,' with the sole purpose of 'deepening bonds,' you steal our hearts with each encounter..."
Wait a minute... I'm here to save the world, what are you going to do to me?!
[List of Bond Relationships] *As of the end of the [Scepter] volume