The story starts with Narasaki's POV, letting the reader know his impressions of Terashima. Narasaki doesn't understand him since he's so silent and acts indifferently, but thinks Terashima is an interesting guy based on what he reads, and there's something more just than his book preferences. Days pass by, and Terashima asks Narasaki some help with his studies, and also asks him for a reward if he gets better grades. Narasaki agrees, and tells him that he only has 300 yen and has to think in something that can be bought with that amount. Terashima accepts the deal.
Day after day after Narasaki finds himself thinking more and more in Terashima, and waiting for that brief time they share in the library before leaving school.

The way Narasaki is dragged to Terashima is so natural that the reader can infer easily that he's starting to like him in a romantic way, and is cute to see how Narasaki doesn't understand why he is thinking so much in this guy. Oh, that's it! The reader gets it: Narasaki has never been in love before.

Summer break arrives and their responsibilities as receptionists end, and they won't be doing the same job once they return to school. Narasaki keeps thinking in Terashima, in how nice was spending time with him, and in how great was finding someone to talk his interests and have a random talk.

Narasaki misses him, he enjoys being with him; he had a reason to like school, a reason to not to be bored anymore. Oh, but it's summer break! And he's bored in his home without anything fun to do!

Having nothing at home, he goes for a walk and buy something for his brothers. In his way, he meets Terashima, who was walking around to buy ice cream.

Narasaki feels happy. He didn't expect that meeting. The feels! Doesn't everybody feels like time stop and everything is more interesting when that one person you have been thinking about appears? Ichikawa sensei made a good move here because it's only obvious to the reader while Narasaki, being a dense character isn't even able to put into words all that. His very first time in the love department.

After sharing a short talk, Terashima asks Narasaki for the promised reward. Narasaki reminds him that he only has 300 yen, but Terashima tells him that the reward he wants won't cost anything. Narasaki is suddenly kissed by him. And in many other occasions after that, Terashima kisses him again.

He doesn't get why Terashima does it, but Narasaki starts to think he might be in love with him.

What is nice about Blue Sky Complex, is that Ichikawa sensei, as she has done in previous stories, once again plays with her character's POVs, and let us know the counterpart of Narasaki: Terashima, who is also a really well written character.

Under Terashima's POV, we learn that he realized that he was gay during middle school, and just to confirm it he accepts going out with a girl from another class. We also learn that he had his eyes put on Narasaki even before they met: Terashima was attracted to his gaze and looks; he was so interested in him that he started to get early to school just to see him.

So, Terashima does know he's in the love department, he's faster understanding himself than Narasaki, and that side of him makes the reader wants to know more about his thoughts and reason to act the way he does. Oh, man! This character is a total mystery during the first chapters, and damn! Ichikawa sensei has played a really good move with him! Why did he act so indifferent when he was with Narasaki at the beginning if he liked him before they met? I bet all readers were starving for this when reading it for the first time.

After being asked to be a library receptionist as a punishment because of his behavior, Terashima finds himself sitting next to Narasaki without having never imagined that he was going to have the opportunity to share some time with his crush. In this very part of the story the POVs collide, and the reader can know what was happening in Terashima's mind while Narasaki was starting to have an interest in him. Under that cool and mysterious facade, Narasaki saw every day, a really excited Terashima was hidden; his heartbeats were a total mess.

So that's the reason! Terashima was so nervous, and he, perhaps, expected Narasaki to start a conversation? It's really fun that they were asking themselves why the other was so silent at the same time. Terashima is afraid of having his feelings noticed by Narasaki because they're so strong and have grown since they met, but at the same time, he wants to be noticed by him. Terashima thinks Narasaki is a bit cold and strict, but he's also warm and has a complex way to see things, a divergent one compared to the people who usually surround him.

Finally, Terashima is who ends starting a conversation with Narasaki. And then the distance between becomes shorter.

He kisses him during the summer, and he does again and again in other opportunities until Narasaki realizes that he's in love with him, and a beautiful romance blooms.

I don't know if this exactly expresses all my thoughts on this masterpiece, but I tried. All I know is that I knew I discovered a good reading when I finished the second chapter.

and that he only had sex with that girl in middle school because he couldn't come to terms with his sexuality.

that terashima was the bottom :( it was probably really obvious to some lol I don't know I just really wanted narasaki to bottom, the cover is a little misleading haha oh well hopefully they'll switch?

Also, the tachi character looking up how to gay sex on his phone right before doing it... AHAHAHAHA /beats the wall

Dammit tachi-san, if the neko tells you to stop, stop. D< Sigh... at least it was realistic.