In my selfishness, I'd rather they actually grow into loving one another before doing all of this. But I understand the urgency, the time value, and somewhat their ultimate love for one another.
Do Keisuke and Moriya love each other right now? I don't know. Do I think it's unfair for them, especially Moriya because this is a sacrifice? Yes. If I was in Takae's shoes, would I be sad? Yes. All these conventional thinkings are from me. But let's take grandma's words here, if I were in their shoes, what will I do? How will I be? And I think, even though it's sudden, it will also be a gradual process. In life, we all want to go in our own pace. But to live is to suffer. We will be push and shove, sometimes violently. If by chance we have it quite alright, we will find happiness, better yet contentment, in all of that.