Yeah First, I don't know about the meaning of this song yet. But when I play and listen to this song, I wan't to crying. I don't know why. When I listen to this song my feeling being sad until I wan't to shed a tear.
By the way, now I'm doing my homework while listen this music ^_^ (yeah, although I'm play with my handphone too hehe. I'm bored because so many homework there so I write this on wattpad)

This is the lyrics. But.. I copy this from GOOGLE (I not made it)

Romaji:

Tsuyu no mannaka
Kyou wa ame agari
Namanurui kaze
Shizuka na yomichi wo
Toorinukeru natsu ga chikai

Hikari kagayaki
Kono me wo ubai
Te ni shitaku naru
Furete mitaku naru
Anata wa kono hotaru no you

Mou ii kai mada mitai
Mou ii kai sono kokoro

Anata no kimochi ga mienai
Nozomu hodo kurushiku naru
Sore demo kirai ni narenai

Fuwari fuwari to
Chuu wo mau hotaru
Sukoshi hanareta basho kara
Miru no ga ichiban ii
Sotto sotto

Tsukamenai todokanai
Tsukamenai sono kokoro

'Jibun dake ga omotte iru'
Kanjiru to nakitaku naru
Onaji kimochi ni wa narenai

Mou ii kai mada mitai
Mou ii kai sono kokoro

Anata no kimochi ga mienai
Nozomu hodo kurushiku naru
Sore demo kirai ni narenai

'Jibun dake ga omotte iru'
Kanjiru to nakitaku naru
Anata no kimochi ga shiritai

Anata no kimochi ga mienai
(tsuyu no mannaka
kyou wa ame agari
namanurui kaze
shizuka na yomichi wo)

Sore demo kirai ni narenai
(shizuka na yomichi wo
toorinukeru
natsu ga chikai)

(Kyou wa ame agari)
Natsu ga chikai