Shizuku Hanabira Ringo no Kaori

From Liquid Passion: When business leads Haruna to Nakagawa's family-owned brewery, it's love at first sight for Haruna. Too bad that Nakagawa and his crotchety grandpa can only say "not interested" to his offers. Will Haruna ever secure the distribution rights to the best sake in town? And more importantly, will he manage to win over the cantankerous brewer's grandson?