Series title
"ACUTE and ReAct"
Uploaded August 21, 2009
Singer(s): KAITO, Hatsune Miku, and Megurine Luka, Kagamine Rin, and Kagamine Len
Kurousa-P (music, lyrics)
Ichiyou Moka (illust)


ACUTE and its sequel ReACT, talk about a series of love triangles that involve the five protagonists.



Uploaded Aug.21.2009 Featuring KAITO, Hatsune Miku, and Megurine Luka
Music Kurousa-P Main article ACUTE
Lyrics Kurousa-P
Video Ichiyou Moka
This song has reached over 1,000,000 views. The song talks about a love triangle between KAITO, Miku & Luka. Although KAITO seems to be engaged with Miku, he keeps a parallel relationship with Luka. To make it worse, the group were good friends in the past. Miku suspects that KAITO is unfaithful, but she doesn't dare to ask as their relationship deteriorates. Meanwhile Luka, aware of the betrayal, takes the role of the typical awaiting mistress. One night Miku calls Luka in the middle of a encounter with KAITO, and although she tries to conceal it, Miku hears what's going on.

Later, Luka is shown regretting and lamenting about the old days when they were good friends. Miku, feeling betrayed for the broken promise, heads to Luka's place holding a knife in her hands, catching them in flagranti. She threw herself into KAITO's arms crying, then the PV shows her looking briefly to Luka, smiling before stabling herself in the neck. The song end with Miku's final words, which implies that she stabbed KAITO as well in attempt of taking him with her (later proven true in it's sequel: ReACT).


Uploaded Apr.04.2011 Featuring Hatsune Miku, Kagamine Rin, and Kagamine Len
Music Kurousa-P Main article ReAct
Lyrics Kurousa-P
Video Ichiyou Moka
The song starts with the ACUTE's melody in piano along some scenes of the previous PV. The songs starts, showing Miku in a hospital. She survived her attempt of suicide and is in recovery after the incident. There she meets Len. Len attempts to help her, but to no avail. Miku is already aware of the relationship between Rin and Len and does not wish for history to repeat itself. Her memories of ACUTE haunt her and she is still wearing the ring that KAITO gave her. Rin, at first, believed that eventually the situation would be resolved quickly. However, the more Len's involvement of trying to help Miku lingers, the more Rin becomes impatient and jealous.

Miku is incapable of freeing herself from the past as she still has an attachment to Luka and she is still in love with KAITO (wearing her engagement ring as proof). She does not know how to smile anymore and she does not accept Len's help because she does not want any more people involved. On the other hand Rin is about to repeat the same mistake that Miku made in ACUTE in order to get Len to notice her, suicide. In a final confrontation between Len and Miku on the hospital's roof, Miku glimpses Rin approaching with a knife in her hands, confirming her suspicions. Seeing that the story is repeating again Miku finally reveals what happened in ACUTE. She tells Rin not to make the same mistake she did. Then Rin hugs Miku crying, and Miku for the first time smiles in the whole PV. Finally the PV's end shows KAITO in a wheelchair along with Luka, confirming that he was attacked by Miku and survived too, but because of being traumatized for so long, Miku now believes that she has nowhere to go, and she can never love anyone again. Also, the PV shows Rin and Len together in the end as well leaving ReAct in a seemingly "happy ending."


Both ACUTE and ReAct are featured in the EXIT TUNES compilation album Vocalocluster.

Other media appearancesEdit

Publications Edit

A novel based on Acute was released on July 26, 2014 and ReAct on November 27, 2014 from PHP Institute, Inc.


The series, particularly the song ACUTE, was featured in the videogame -Project DIVA- f, getting their own modules and merchandising for the PS Vita.


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