かきゅうせい
student in a lower grade; underclassman
Noun
山田君きみってさ、同おなじ学年がくねんの女子じょしには人気にんきないけど、下級生かきゅうせいにはモテるんだよね。
Yamada isn't very popular with the girls in his school year, but he's popular amongst the younger students.