This also goes back to his father in one of the earlier chapters chapter 4 of vol 2 asahi is holding kousei his younger brother quite close as his mother and father are fighting and yelling about how their fathers legs don’t work and how he’s using all of the money the mother makes to buy booze. One of the words she uses is defective, that she doesn’t want to be with a defective man, this word overall just seems to strike asahi in the heart as he doesn’t relate it to good memories that he has.
oh true. not only that, the long haired guy was trying to pinpoint how asahi dated masato because he will no longer have baby stuff problems, because he’s a man. and will masato still love him if he’s just a convenient lover, honestly I feel bad for masato, he’s always kept in the dark. but i think asahi do loved masato, he just needs to fix his past trauma from his cheating ass wife
.
.
.
.
.
.
.
.
.
.
.
.
.
.
The reason why, I think, Asashi gets sullen when they use the word 'defective' is because he once suffered emotionally for not being able to impregnate his wife. She left him after she got pregnant with another guy, even though they slept together only once. In an earlier chapter, Asashi talked about how he felt guilty for not giving her the happiness of motherhood. He considered himself 'defective'
So, this is why it triggers him every time they call the wood for his project 'defective'.