
ok I m a super fan of yaoi but really sometime it's like ... really?!?
Like in the last story ... I don't think a guy will switch gay just like that... will they?

Yes because here the seme and the uke were best friends so we can imagine that the uke was always in love with him but didn't realize it because he was so used to be always together with his friend. So when the seme confessed his love he understood that he was also in love and it was useless to resist :p

That's assuming there is a concrete boundary between the two; for a lot of people it's not such a simple dichotomy.

hum... dose it miss some page here?
is that its link to this one !?
http://www.mangago.zone/read-manga/yondaime_ooyamato_tatsuyuki/
the guy have the same tatoo...
so the moral here is : bad guy always win hein....