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The Symbolism is just

Green Emerald September 17, 2017 1:20 pm

Unbeknownst to Imagase, Kyouichi's conscience came in three; White, Black & Grey. & I want to say Kyouichi always went with Grey who personified his indecisive (if it's not a problem now, then let's not worry 'til it is) & go with the flow character. It was beautiful to see how Grey changed:
http://www.mangago.me/read-manga/sojou_no_koi_wa_nido_haneru/mf/v01/c004/82/
It's the first time we see Grey take a stand & the fact that Kyouichi is wearing a matching shirt is no coincidence. Sensei is a genius! Let's take a moment and bask in the symbolism of it all~ Shall we?

When we see what's supposed to be the three again here:
http://www.mangago.me/read-manga/sojou_no_koi_wa_nido_haneru/mf/v01/c004/111/
We only see Black & White. Why? Because Grey & Kyouichi have become one:
http://www.mangago.me/read-manga/sojou_no_koi_wa_nido_haneru/mf/v01/c004/112/
Meaning that Grey/Kyouichi is taking a big step in demonstrating his readiness for equal responsibility, if not greater due to Imagase's insecurities & preconceptions about him, in the relationship.

It was at this point that my feelings of frustration & anger towards Kyouichi washed away.

Responses
    zuzupet September 17, 2017 7:22 am

    you explained this perfectly & beautifully! for so many years I have tried to tell 'kyouichi haters' this and failed, I will I had your comment to copy and paste everywhere <3

    zuzupet September 17, 2017 7:23 am
    you explained this perfectly & beautifully! for so many years I have tried to tell 'kyouichi haters' this and failed, I will I had your comment to copy and paste everywhere <3 zuzupet

    I WISH I had (not will lol)

    Green Emerald September 17, 2017 1:50 pm
    I WISH I had (not will lol) zuzupet

    I'm glad you feel the same way (▰˘◡˘▰) This is one of my all-time favorites because of the raw emotion that is felt throughout~
    Symbolism is hardly found in manga, & there's even more to look back on, scrutinize, & admire in this piece.. so much that it makes my heart explode with happiness <3
    If you wish, you may share as you please.