
Oh dear... You have to trust in his love for you. Hopefully gramps will knock some sense into this boi.

this is sooo complicated i wish i didn't read it till it ended completely, why people rn't trying to give each other a chance and accept each other's kindness agh tsk tsk ihave two uncles the r deaf and they don't talk either and they r married , have kids, i talk with them through signs( i only know letters using signs) and some times they read my lips , they r not feeling like they lack in any way , they work and make money they drive too. so i can't really why this manga is sooo dark my heart hurts for Taichi so much i don't understand why Kouhei labeling himself as burden while Taichi is 100% ok with him

Things to think about from chapter 1:
-a grave for the "Kobayashi" family, which is Akihiko's last name
-the smartphone Kazushige was using which means it's way in the future
-Akihiko wearing modern school uniform in the official colored page

I don't think Akihiko is wearing a modern school uniform. Those uniforms come from men's every day clothes since the 1800's (that's in the western side, like England and such places). Men's fashion just began to clearly evolve/change since the 1970's, before that, all men wore suits and those didn't change much since the end of the 1700's. Also, you can clearly see Akihiko wear similar clothes throughout the whole manga.
Haha.... It's been a while since I've seen the self-lubricating butthole of yaoi legends