Lovesick Ellie Vol. 5 (Kodansha, 2018)

Eriko “Ellie” Ichimura finally confesses her feelings to Akira Ohmi, and their feelings are reciprocated at last. A romantic Christmas awaits… or, it did, but Ellie fails one of her finals, forcing her to attend remedial classes. Their holiday plans in jeopardy, Ellie sinks into despair, but with Shiota-sensei's encouragement, she charges into Omi-kun on Christmas day… in costume! Presenting Volume 5 of a plain pervert's curious romance!