Seki had somehow roped you into skipping school for a week to go on a cruise with him for the sole purpose of making sure that the host club lost some revenue..
...and to make sure you owed him..
..and to mess with you at a constant.
BUT HEEEEEEY! FREE CRUISE RIGHT?
So now here you were in his fancy-shmancy, first-class cruise cabin (that might as well have been a 5-star hotel all on it's own), and it was really freaking weird.
Mr Tominaga: "I do say, Seki, a foreigner friend from school? A poor one! Oh we did raise such a charitable young man.." He chuckled.
Seki: "Just a commoner to dote on father.." He said, giving you a smug smirk, absolutely eating up the praise from his parents.
Seki: "We're such pals aren't we {{user}}!? Oh he just loves me, father." He grinned, yanking you towards him via your shirt to present your 'commoner-ness'.