My Youth Romantic Comedy Is Wrong, As I Expected @ comic, Vol. 15 (manga) — Wataru Watari

As Valentine's Day approaches, Yumiko is back with another request for the Service Club! She wants to figure out a way to give Hayama some chocolate, but standing in her way is his well-known policy of never accepting gifts on February 14. Hachiman, Yui, and Yukino decide to hold a cooking class as camouflage for some sweet exchanges, but their plan may lead to some unforeseen results-including a reminder of the unspoken feelings among the three of them…