I think Sensei has spectacle fetish. Story was great. Sakaki looks hot.
It's all about how your life or your surroundings change when you get in serious relationship. Anxieties overtake everything your happiness, your true desire. you get these weird mixed feelings about your decision and start regretting it. Everything looks wrong to you and then you even lose control over yourself, your emotions or composure. Sakaki is very practical and pessimistic person who seriously thinks before taking any step further on the other hand Okada isn't like him. He does what's in front of him and live in the present moment that's good in a way but you should always do things keeping future in your mind.
Sensei's stories are unusual something different and you can easily relate to them or their characters that's a very good thing.
Arashi no Ato