Firstly, it's a story about
honesty.
Whole lot of bullshit would be avoided if any character open up, talk or don't fucking lie.
Secondly, the characters:
Sakura/Umeko - she had a tragic past, parents died and without proper development, was raised by harsh grandma who taught her being not reliable on others but completely scarring her into timidness/introvercy in the process.
She has fallen in love with Kurahashi, taking bullying as attention she craved, completely disregarding fact he truly didn't give a shit about anything.
Then came along Makoto, but her heart was already stolen and took his genuine interest as annoyance in her goal to steal Kurahashi away from Sawa.
Time Slip happened, Makoto grew out mostly out of his abandoning issues and found his true love Miiko. She still has interest in Kurahashi who's now 32, but slowly realised she fucked up with Makoto although still thinking his care and intentions were an irritation as she didn't experienced it before.
Time Slip forward, by living together with amnesiac Makoto she experienced all the hardship of a functional couple, finally falling in love with a person who she treated as an obstacle toward don't-give-a-shit Kurahashi. Unfortunately Makoto regain his memory, most of the trauma of waiting for her and finally finding his true love.
After Makoto reunited with Miiko, who despite Kurahashi's moronic opinion of not being attached to anything, waited for him all 16 years.
Time Slip into past after she went missing, Sakura pack her clothes (the big beret especially) and Time Slip into collage days taking personality as Umeko.
Due to seeing how Makoto truly loved Miiko and heartbroken it's not her, realising how her disappearing messed him up with abandoning issues she got to know from the diary, decided to make Makoto hate her so he can move on with Miiko in the future, not knowing it ignite his pain driven love to her.
Final Time Leap as Umeko/Sakura unfortunately most likely commited suicide under the cherry blossom tree after Umeko/Sakura pushed Makoto under the car knowing Sakura leaped to the rescue, completing the loop as "it's finally over", the students mentioned a knowin rumour...
Kurahashi - Fuck this guy. Although he is somewhat good, doesn't give a single fuck about his actions, for him things don't matter a slightest.
It's "all his fault", if he wouldn't accept Sakura confession in which he wasn't interested actually, as her disappearing (although concerned at first) didn't bother him at all, since he easily dropped an attempt to find her compared to what Makoto was doing continuously.
Miiko - I wholeheartedly admire her patience and sorry she got involved in all that bullshit, but her and Makoto finally reunited without nothing interrupting in the the future, hopefully Kurahashi that she works for doesn't get involved.
Lastly, it was very painful to read, sometimes it hit too much home, but it was a good story.
10/10 won't read again, I'm too emotionally drained.
Thank you very much for scanlation, without your work we wouldn't appreciate this fun but also very depressing story.