This, introduced us to Miyagi, sort of keeper of the shop in which Kusunoki sold off his 30 years lifespan to. She later came to observe Kusunoki on his last 3 months to prevent him from doing anything dangerous as this is what most people would do noticing that they are nearing their death.

Kusunoki later finds out that his life's value is only worth 10.000 ¥ per year.

Of course, a person life's value cannot truly be measured no matter what. But at this shop, one's life value is measured based on his contribution to society, how much of an influence someone has on another and so on.

And there's 3 thing that you can offer yourself to sell. Health, time and lifespan.

He laughed at how much his life is priced at, indicating that he's done only a few to be considered useful. The story progressed, as now that we see Miyagi is following him around as it is her job as an Observer. Starting from this, we're thrown out into an emotional roller coaster ride.

We later found out what kind of problem plagued out with Kusunoki.

And then we flashback to Kusunoki's past. As a child, Kusunoki is smart, a kid that is a loner and shunned by everyone but is very entitled. How do I explain this? It's like that one kid who most people bellitled but deep down he underestimated everyone and saying things like, "just look at our standings in the future" but he's actually got real potential. He's good at the art of painting.

There is also another one with same type of problem. That one, her name is Himeno. Let's say both became childhood friends knowing they have the same struggle.

Now go back to present, we knew that Kusunoki in his current state isn't what his past self wanted to be. He wondered about his past as the feeling of despair and hopelessness shrouded on him. It's a very relatable feeling.

As a child, we all have a dream that we want to live up. There's those that are able to fulfill their childhood dreams, some are not. Some of those who aren't, got a decent result, but some aren't very lucky as they are haunted by problems and inability to find their own path.

You see, these guys, as they grow up, usually when on highschool, they started to think.

They started to fear their own future. Their own pride started to ruin them within because of the expectation they put themselves in. The anxiety kicks in.

They started to reminisce their past. Guilt is pilling up from their own action in the past events.

They started to question their own life.

Being hopeless or useless isn't something good. Doing crimes is even worse, it's something unjustified. But we don't symphatize with crimes or the person's flaw itself. Never.

It is the reasoning that we symphatized ourselves with.

I think author really did a very good job on explaining the main character's background story. How Kusunoki feels at the time, the author really gave us some top-notch reasoning for us to relate, as to why Kusunoki is being a hopeless person. It's how to learn to be human.

Later on in the story, Kusunoki is faced with a lot of things, on how reality is messing with him. From how his acquaintance from college isn't the person he expected him to be, to a surprising encounter with his childhood friend, that turns into an immediate disaster.

Kusunoki faced those many hardships, learn to accept his own past, his regrets, his fate and improve as a person to overcome many problems.

From this many moments, the relationship between Kusunoki and Miyagi develop. They'd go on to reveal their own feelings about each other. She's also telling him her own problems, her past.

That she's accepting her job because the debt his mother made from selling her lifespan. That her mother had gone su*cide and forced the debt on Miyagi. Forcing her to sell off her time, becoming keeper on that shop. People can't see her because of that. How she actually has one kind of a childhood friend herself. Just the difference is that, her childhood friend had forgotten about her a week later.

Then came the agonizing truth. That Kusunoki life's value isn't worth 300.000 ¥. It's actually just 30 ¥. Those 300.000 ¥ is from Miyagi selling off his entire time, leftover money from paying her mother's debt.

Knowing that, Kusunoki tried to find a way to paid her debts off. To regain her time. And we're back to his childhood. What he's good at? That is the art in painting. He would draw in his sketchbook since then.

He showed at the shop where he first met Miyagi, meeting different shopkeeper and sold off his last 30 days. Shopkeeper seemed to be in shock because it turns out, Kusunoki would later paint world-renowned pictures.

That it would contribute so much, those mere 30 days terrifyingly has a lot more value than his entire 30 years remaining.

This would be the most critical point in his life. The biggest decision he would ever make. What would he do?

He chose to sold off those 30 days lifespan. So that his most beloved would be having a chance to see a better future. Still don't paid her entire debts, but almost all of it.

Then they said that the last 3 days can't be sold as they said the store would still give the person some time remaining to enjoy their own life. I mean, if you tried to sell your entire lifespan for money, then it would be useless if you're dead right away.

His remaining 3 days, he goes into a park he used to go with Miyagi. Then he started crying. That he would never see her again.

He couldn't live those 3 days without her.

And well do I ever explained that in between the timeline where the disaster with his childhood friend occurred and when he sold off his 30 days, there is this certain period of time where he brags to everyone about how he's having Miyagi as a girlfriend?

He praised her, how she's a real beauty, that she's nice and always treat her like she's there. Damn boy, he's growing a real lot as a character. From hopeless guy to a nice loving boyfriend.

Yeah although that would make him seem like sorta crazy person because everyone just can't see Miyagi. Remember? But everyone just liked him anyway because he's likable.

The crowd is asking him why he's sad. He said that he can't be with Miyagi anymore.

Luckily though, Miyagi appeared to see him. Everyone's surprised. To Kusunoki, I mean how is she there? She's supposed to be non-existent to them. They supposedly can't see her yet. There's still a little debt left for her.

So how? Simple, she sold off her remaining lifespan so that she also has the same 3 days remaining, after knowing what Kusunoki did. She's determined.

It's not exactly the biggest twist someone could ever pull off. But you won't really notice or don't really care anyway because you're too immersed in the story.

It's amazing, it's hopelessly beautiful. My god, it's an ultimate act of romance.

Rather than having her own freedom to continue living, she'd rather be with her most beloved person, together in their last moment.

For Kusunoki, he'll die leaving nothing behind. His 30 days life would probably have more value for anyone else. But for him, it doesn't matter anymore.

However happy or sad something is, you'll soon forget it if you don't get a chance to recall it. What people don't realize is that they've forgotten about forgetting. If everyone really preserved the happiest memory from their past perfectly, they'd only be sadder living in their relatively hollow present. And if everyone preserved the worst memory from their past perfectly, well, they'd still be sad. Everyone just remembers what it's inconvenient not to remember."