Hmmm...difficult decision. Since I don't follow NEWS much, I can't be of any help concerning Shige and Koyama. But maybe you could make some connections through them meeting for TV-shows? Also dorama het pairings are a good start :D
I love Junxhet pairings (with Mizuhara Kiko for example <3). And I think in general Arashixhet works for me. Also Ryo with some of his female dorama partners (like Aragaki Yui, or Anne, or Mizukawa Asami) Kamexhet sounds cool too (with Omasa Aya <3) In general het is so rare that I think most het-pairs are interesting ^^
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I love Junxhet pairings (with Mizuhara Kiko for example <3). And I think in general Arashixhet works for me. Also Ryo with some of his female dorama partners (like Aragaki Yui, or Anne, or Mizukawa Asami) Kamexhet sounds cool too (with Omasa Aya <3)
In general het is so rare that I think most het-pairs are interesting ^^