Credit to those for Japanese lyrics. Translation from http://www.youtube.com/watch?v=RZ0RFWKTkUQ

幸せですと言葉で何回言った記憶あるだろう？
shiawase desu to kotoba ade nankai itta kioku arudarou?
How many times did I say I was happy?

言葉にするともどかしい事ばっかりでずっと避けてた
kotoba ni suruto modokashii koto bakakari de zutto saketeta
I've always avoided telling someone these words because it's frustrating

ただいまってあなたに言う瞬間
tadaima atte anata ni iu shunkan
At the moment when I tell you "I'm home"

私は私へと戻れる気がして
watashi wa watashi e to modoreru kiga shite
I can return to my true self

強くなる必要なんてない
tsuyoku naru hitsuyou onante nai
It isn't necessary to be strong

ありのままで輝いてる
arinomama de kagayai teru
I've been shining as my normal self

生まれたときからずっとまっすぐ
umareta toki kara zutto massugu
Since the day I was born

変わりたいって願った時もうすでに変わってるんだよ
kawari taitte negatta toki mousudeni kawa tterundayo
When I wanted to change myself, I was already changed

教えてくれてありがとう　
oshiete kurete arigatou
Thank you for telling me

信じたい
shinjitai
I want to believe

Signboard:

He made me forget who I was up until that day

I feel I could face my true self for the first time

The girl who he loves hides her true self behind her public face

Thank you for everything, Uesugi-kun
What? Any complaints?

I've been your childhood friends for over ten years
Am I your destined soul mate? I'm blushing

You never told me about the remarriage
I've heard a bad rumor about you and women

You're him
I'm pleased to be a classmate of such a great student

I'm home

He'll fall in love twice this summer.