Would a kiss on the cheek be okay?

Hoppe ni chuu demo dame desuka I want to hold hands and be kissed... Yuito is in love with his childhood friend, Ryo, who is seven years older than him. Believing Ryo's words, "I'll marry you when you become an adult (20)," he diligently makes lunch for him every day and dotes on him, but Ryo remains indifferent. No matter how much he pleads, Ryo won't be affectionate! Yuito devises a plan to test Ryo's love...?