->''"The starry sky lies beyond this vast blue. Normally, you can't see it, but it's there, like a heart."''
-->'''--Opening Narration'''

''Sora Log'' is a 2008 {{Shoujo}} manga series by Kako Mitsuki.

[[PluckyGirl Hikaru Minami]] loves the sky and is a part of Higashi High School's astronomy club. During school, she has a chance encounter with infamous fellow student [[TroubledButCute Asou Minato]], nicknamed "the bad king of [[MaliciousSlander bad rumors]]" and a {{delinquent}} who has bleached hair and rumored to have been violent in middle school and had to go to reform school. Due to this, students and teachers alike are distrustful and intimidated by him. However, Hikaru is drawn to Asou after hearing a bell that he often carries with him and soon wants to get to know him and befriend him. Others attempt to dissuade Hikaru from having anything to do with Asou, as they think he will have a bad influence on her, but Hikaru wants to believe in the Asou that she sees and knows that he's not a bad person.

Hikaru learns that [[BeneathTheMask behind]] his dangerous appearance, Asou is a kind person and as Asou begins to warm up to Hikaru, they gradually become closer. However, Hikaru's older brother [[BigBrotherInstinct Yui]] believes that Asou shouldn't be anywhere near Hikaru because Asou might indirectly [[MusicalTrigger trigger]] a traumatic memory that Hikaru has [[TraumaInducedAmnesia long repressed from childhood]] and Yui would rather her not remember it, and Asou's sister-in-law [[TheRival Shizuka Asahina]] doesn't take kindly to the progress of Hikaru's and Asou's growing relationship and seeks to sabotage them so Asou can return to the world of music and progress his skills as a pianist.
!This series contains the following tropes:

* AlmostKiss: Between Hikaru and Asou in Chapter 6.
* AllGirlsWantBadBoys: Averted. Hikaru cares little for the {{malicious slander}} surrounding Asou and is attracted to his [[SingleWomanSeeksGoodMan kind heart]].
* BadDreams[=/=]DreamingTheTruth: Hikaru has a few occasions where she dreams bits and pieces of the memory when she was four-years-old, but there is nothing significant pertaining to the tragedy of the incident other than going to see the stars with her brother and hearing the sound of a bell.
* BigBrotherInstinct: Yui.
* BoyMeetsGirl
** MeetCute
* BroodingBoyGentleGirl
* CannotSpitItOut: Yui, in regards to Hikaru's traumatic memory.
* CoolOldGuy: Uncle Taku.
* DefrostingIceKing: Asou.
* {{Delinquent}}: Asou.
* FailureKnight: Asou indicates that the reason why he was provoked into a fight when Hikaru was threatened is because a long time ago, [[CynicismCatalyst he failed to protect someone important to him]] and didn't want to lose Hikaru as well.
* IWantMyBelovedToBeHappy: Hikaru assumes that Asou is in love with Shizuka, so she wants him to be happy as long as she can still love him from afar. This isn't the case as it turns out that Shizuka is Asou's sister-in-law.
* IllGirl: Hikaru is said to have a frail body and was often hospitalized in her childhood.
* InSeriesNickname: Yui is called [[GrumpyBear "Brother Bear."]]
* {{Kuudere}}: Asou.
* LastSecondChance: In Chapter 8, Asou chillingly warns Shizuka not to hurt Hikaru, as he will not forgive her "a second time."
* [[BigBrotherWorship Little Sister Worship]]: Yui has quite the sister complex to the extent that when Hikaru threatens to never call him [[UsefulNotes/JapaneseSiblingTerminology "big brother"]] again, Yui is immediately obedient, and when Yui [[{{Sneezing}} sneezes]] while at his part-time job, a co-worker suggests that perhaps a girl that Yui likes is talking rumors about him, and Yui's first reaction is that it's ''Hikaru''.
* LockedOutOfTheLoop: There is a memory that Hikaru repressed when she was four-years-old because it was a traumatic experience for her. Because of this, Yui wants Asou to stay away from Hikaru, as the sound of a bell and piano playing resemblances sounds heard her experience and can trigger the memory that Hikaru has long been unable to remember.
* ManicPixieDreamGirl: Hikaru.
* MySisterIsOffLimits: Yui is ''very'' protective of Hikaru, to the extent that Hikaru's friends jokingly say that if Hikaru ever got a boyfriend, Yui would kill him. It's to the point that rumors spread that they were a [[BrotherSisterIncest couple]] until it died down. Played straight in Chapter 5 when Yui specifically tells Hikaru that Asou is the only person that he doesn't want her to be with.
* NotBloodSiblings: Asou and Shizuka.
* OneHeadTaller
* ParentalAbandonment: Asou's parents are both musicians, so they would often be away, leaving Asou to learn how to cook for himself. They are currently divorced, and his father is living overseas. Due to unknown circumstances, Asou goes by his mother's maiden name "Minato" rather than his family's surname "Asahina."
* ParentalSubstitute: Uncle Taku towards Asou.
* PluckyGirl: Hikaru.
* RealMenWearPink: Due to his parents constantly being away from he was a child, Asou has learned how to [[SupremeChef cook]] and [[NeatFreak clean]] for himself... and for his Uncle Taku, who does more harm than good when ''he'' offers to help Asou with chores.
* RelationshipSabotage: Yui and Shizuka decide to help each other in trying to sabotage Hikaru's and Asou's new found relationship. The former wishes to do this to protect Hikaru and to have her not remember her traumatic memory, and the latter wishes to return the gifted pianist Asou to world of music rather than for him to be tied down in a regular world by a mere girl.
* TheRival: Shizuka.
* ShoujoDemographic
* ShoutOut: To ''Manga/NausicaaOfTheValleyOfTheWind'' in Chapter 6.
* SleepCute: Hikaru and Yui sleep side-by-side during a train ride in Chapter 4.
* SliceOfLife
* SmokingIsCool: Uncle Taku.
* TraumaInducedAmnesia: Hikaru cannot remember a single thing from when she was four-years-old, as something traumatic to her happened around that same time that caused her to repress the memory. The memory in question can be triggered by things that she experienced in the memory, such as [[MusicalTrigger hearing a bell or the sound of a piano playing]].
* TroubledButCute: Asou.